json/reversible_dynamics.json

[
  {
    "video": "istockphoto-1404571842-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1404571842-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2181943174-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2181943174-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1946237411-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1946237411-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1955570176-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1955570176-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2188311607-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2188311607-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2214185062-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2214185062-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-521328122-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-521328122-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1314907724-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1314907724-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1314907794-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1314907794-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1314907748-640_adpp_is.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1314907748-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person's face. What is the state change of the person's eyes?",
    "candidates": [
      "The eyes are closing",
      "The eyes are opening",
      "No change happened"
    ],
    "answer": "The eyes are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1288434083-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the state change of the person's posture?",
    "candidates": [
      "The person is sitting up",
      "The person is lying down",
      "No change happened"
    ],
    "answer": "The person is lying down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1288434083-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the state change of the person's posture?",
    "candidates": [
      "The person is sitting up",
      "The person is lying down",
      "No change happened"
    ],
    "answer": "The person is sitting up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2181432255-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the state change of the person's posture?",
    "candidates": [
      "The person is sitting up",
      "The person is lying down",
      "No change happened"
    ],
    "answer": "The person is lying down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2181432255-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the state change of the person's posture?",
    "candidates": [
      "The person is sitting up",
      "The person is lying down",
      "No change happened"
    ],
    "answer": "The person is sitting up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1303077759-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the state change of the person's posture?",
    "candidates": [
      "The person is standing up",
      "The person is lying down",
      "No change happened"
    ],
    "answer": "The person is lying down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1303077759-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the state change of the person's posture?",
    "candidates": [
      "The person is standing up",
      "The person is lying down",
      "No change happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-531350243-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-531350243-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1193182538-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1193182538-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1291282337-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1291282337-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2184485885-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2184485885-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2187100549-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2187100549-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2194198265-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2194198265-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2208674013-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2208674013-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2194538103-640_adpp_is.mp4",
    "question": "This is a video of two persons. What are they doing?",
    "candidates": [
      "They are standing up",
      "They are sitting down",
      "Nothing happened"
    ],
    "answer": "They are sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2194538103-640_adpp_is_reversed.mp4",
    "question": "This is a video of two persons. What are they doing?",
    "candidates": [
      "They are standing up",
      "They are sitting down",
      "Nothing happened"
    ],
    "answer": "They are standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2196116173-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2196116173-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2135510329-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2135510329-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2170086685-640_adpp_is_part1.mp4",
    "question": "This is a video of an old lady and a young lady. What is the old lady doing?",
    "candidates": [
      "The old lady is standing up",
      "The old lady is sitting down",
      "Nothing happened"
    ],
    "answer": "The old lady is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2170086685-640_adpp_is_part1_reversed.mp4",
    "question": "This is a video of an old lady and a young lady. What is the old lady doing?",
    "candidates": [
      "The old lady is standing up",
      "The old lady is sitting down",
      "Nothing happened"
    ],
    "answer": "The old lady is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2170086685-640_adpp_is_part2.mp4",
    "question": "This is a video of an old lady and a young lady. What is the old lady doing?",
    "candidates": [
      "The old lady is standing up",
      "The old lady is sitting down",
      "Nothing happened"
    ],
    "answer": "The old lady is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2170086685-640_adpp_is_part2_reversed.mp4",
    "question": "This is a video of an old lady and a young lady. What is the old lady doing?",
    "candidates": [
      "The old lady is standing up",
      "The old lady is sitting down",
      "Nothing happened"
    ],
    "answer": "The old lady is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2188037356-640_adpp_is.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is standing up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2188037356-640_adpp_is_reversed.mp4",
    "question": "This is a video of a person. What is the person doing?",
    "candidates": [
      "The person is standing up",
      "The person is sitting down",
      "Nothing happened"
    ],
    "answer": "The person is sitting down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-101229155-640_adpp_is.mp4",
    "question": "What is the turtle doing in this video?",
    "candidates": [
      "Pulling its head into its shell",
      "Sticking its head out of its shell",
      "Neither of these actions happened"
    ],
    "answer": "Sticking its head out of its shell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-101229155-640_adpp_is_reversed.mp4",
    "question": "What is the turtle doing in this video?",
    "candidates": [
      "Pulling its head into its shell",
      "Sticking its head out of its shell",
      "Neither of these actions happened"
    ],
    "answer": "Pulling its head into its shell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2159636873-640_adpp_is.mp4",
    "question": "What is the turtle doing in this video?",
    "candidates": [
      "Pulling its head into its shell",
      "Sticking its head out of its shell",
      "Neither of these actions happened"
    ],
    "answer": "Sticking its head out of its shell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2159636873-640_adpp_is_reversed.mp4",
    "question": "What is the turtle doing in this video?",
    "candidates": [
      "Pulling its head into its shell",
      "Sticking its head out of its shell",
      "Neither of these actions happened"
    ],
    "answer": "Pulling its head into its shell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-477934228-640_adpp_is.mp4",
    "question": "This is a video of a hippopotamus. What is the hippo doing with its mouth?",
    "candidates": [
      "Opening its jaws wide",
      "Closing its jaws shut",
      "No mouth movement occurred"
    ],
    "answer": "Opening its jaws wide",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-477934228-640_adpp_is_reversed.mp4",
    "question": "This is a video of a hippopotamus. What is the hippo doing with its mouth?",
    "candidates": [
      "Opening its jaws wide",
      "Closing its jaws shut",
      "No mouth movement occurred"
    ],
    "answer": "Closing its jaws shut",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1308837966-640_adpp_is.mp4",
    "question": "This is a video of a hippopotamus. What is the hippo doing with its mouth?",
    "candidates": [
      "Opening its jaws wide",
      "Closing its jaws shut",
      "No mouth movement occurred"
    ],
    "answer": "Closing its jaws shut",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1308837966-640_adpp_is_reversed.mp4",
    "question": "This is a video of a hippopotamus. What is the hippo doing with its mouth?",
    "candidates": [
      "Opening its jaws wide",
      "Closing its jaws shut",
      "No mouth movement occurred"
    ],
    "answer": "Opening its jaws wide",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1909194863-640_adpp_is.mp4",
    "question": "What is the elephant doing with its trunk in this video?",
    "candidates": [
      "Lifting its trunk upward",
      "Dropping its trunk downward",
      "No trunk movement occurred"
    ],
    "answer": "Lifting its trunk upward",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1909194863-640_adpp_is_reversed.mp4",
    "question": "What is the elephant doing with its trunk in this video?",
    "candidates": [
      "Lifting its trunk upward",
      "Dropping its trunk downward",
      "No trunk movement occurred"
    ],
    "answer": "Dropping its trunk downward",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2122014989-640_adpp_is.mp4",
    "question": "What is the elephant doing with its trunk in this video?",
    "candidates": [
      "Lifting its trunk upward",
      "Dropping its trunk downward",
      "No trunk movement occurred"
    ],
    "answer": "Lifting its trunk upward",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2122014989-640_adpp_is_reversed.mp4",
    "question": "What is the elephant doing with its trunk in this video?",
    "candidates": [
      "Lifting its trunk upward",
      "Dropping its trunk downward",
      "No trunk movement occurred"
    ],
    "answer": "Dropping its trunk downward",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-641274528-640_adpp_is.mp4",
    "question": "This is a video of an elephant and a person. What is the elephant doing?",
    "candidates": [
      "Lifting a person with its trunk",
      "Lowering a person with its trunk",
      "No interaction with a person"
    ],
    "answer": "Lifting a person with its trunk",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-641274528-640_adpp_is_reversed.mp4",
    "question": "This is a video of an elephant and a person. What is the elephant doing?",
    "candidates": [
      "Lifting a person with its trunk",
      "Lowering a person with its trunk",
      "No interaction with a person"
    ],
    "answer": "Lowering a person with its trunk",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1147989626-640_adpp_is.mp4",
    "question": "What is the giant panda doing in this video?",
    "candidates": [
      "Ascending the tree trunk",
      "Descending from the tree",
      "Staying still in the tree"
    ],
    "answer": "Descending from the tree",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1147989626-640_adpp_is_reversed.mp4",
    "question": "What is the giant panda doing in this video?",
    "candidates": [
      "Ascending the tree trunk",
      "Descending from the tree",
      "Staying still in the tree"
    ],
    "answer": "Ascending the tree trunk",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1684665458-640_adpp_is.mp4",
    "question": "What is the snail doing in this video?",
    "candidates": [
      "Coming out of its shell",
      "Going back into its shell",
      "Staying still"
    ],
    "answer": "Coming out of its shell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1684665458-640_adpp_is_reversed.mp4",
    "question": "What is the snail doing in this video?",
    "candidates": [
      "Coming out of its shell",
      "Going back into its shell",
      "Staying still"
    ],
    "answer": "Going back into its shell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2185507774-640_adpp_is.mp4",
    "question": "What is the dog doing in this video?",
    "candidates": [
      "Lowering into a sit position",
      "Rising to a standing position",
      "Remaining in the same posture"
    ],
    "answer": "Lowering into a sit position",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2185507774-640_adpp_is_reversed.mp4",
    "question": "What is the dog doing in this video?",
    "candidates": [
      "Lowering into a sit position",
      "Rising to a standing position",
      "Remaining in the same posture"
    ],
    "answer": "Rising to a standing position",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2186518133-640_adpp_is.mp4",
    "question": "What is the dog doing in this video?",
    "candidates": [
      "Rising up on its hind legs",
      "Coming down to stand on all four",
      "Maintaining the same posture"
    ],
    "answer": "Rising up on its hind legs",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2186518133-640_adpp_is_reversed.mp4",
    "question": "What is the dog doing in this video?",
    "candidates": [
      "Rising up on its hind legs",
      "Coming down to stand on all four",
      "Maintaining the same posture"
    ],
    "answer": "Coming down to stand on all four",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2234819548-640_adpp_is.mp4",
    "question": "This is a video of a worm. What is the state change of the worm's body?",
    "candidates": [
      "The worm is contracting its body",
      "The worm is extending its body",
      "No change happened"
    ],
    "answer": "The worm is extending its body",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2234819548-640_adpp_is_reversed.mp4",
    "question": "This is a video of a worm. What is the state change of the worm's body?",
    "candidates": [
      "The worm is contracting its body",
      "The worm is extending its body",
      "No change happened"
    ],
    "answer": "The worm is contracting its body",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "1021488277.mp4",
    "question": "What action is performed with the pineapple in the video?",
    "candidates": [
      "Take the pineapple off the table",
      "Put the pineapple on the table",
      "Nothing happens to the pineapple"
    ],
    "answer": "Take the pineapple off the table",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "1021488277_reversed.mp4",
    "question": "What action is performed with the pineapple in the video?",
    "candidates": [
      "Take the pineapple off the table",
      "Put the pineapple on the table",
      "Nothing happens to the pineapple"
    ],
    "answer": "Put the pineapple on the table",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "1059815936.mp4",
    "question": "What change does the piece of paper undergo in the video?",
    "candidates": [
      "Uncrumple a paper ball into a flat sheet",
      "Crumple a flat paper into a ball",
      "No change occurs"
    ],
    "answer": "Uncrumple a paper ball into a flat sheet",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "1059815936_reversed.mp4",
    "question": "What change does the piece of paper undergo in the video?",
    "candidates": [
      "Uncrumple a paper ball into a flat sheet",
      "Crumple a flat paper into a ball",
      "No change occurs"
    ],
    "answer": "Crumple a flat paper into a ball",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-942163676-640_adpp_is.mp4",
    "question": "What movement does the cat make in relation to the box?",
    "candidates": [
      "The cat emerges and peeks out from inside the box",
      "The cat pulls its head back and hides inside the box",
      "The cat does not move"
    ],
    "answer": "The cat emerges and peeks out from inside the box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-942163676-640_adpp_is_reversed.mp4",
    "question": "What movement does the cat make in relation to the box?",
    "candidates": [
      "The cat emerges and peeks out from inside the box",
      "The cat pulls its head back and hides inside the box",
      "The cat does not move"
    ],
    "answer": "The cat pulls its head back and hides inside the box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1352388756-640_adpp_is.mp4",
    "question": "What action does the chameleon perform with its tongue?",
    "candidates": [
      "The chameleon shoots out its tongue",
      "The chameleon retracts its tongue",
      "The chameleon's tongue remains still"
    ],
    "answer": "The chameleon shoots out its tongue",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1352388756-640_adpp_is_reversed.mp4",
    "question": "What action does the chameleon perform with its tongue?",
    "candidates": [
      "The chameleon shoots out its tongue",
      "The chameleon retracts its tongue",
      "The chameleon's tongue remains still"
    ],
    "answer": "The chameleon retracts its tongue",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1455382321-640_adpp_is.mp4",
    "question": "What postural change does the kangaroo make in the video?",
    "candidates": [
      "The kangaroo drops from standing upright to all fours",
      "The kangaroo rises up from all fours to stand upright",
      "The kangaroo does not move"
    ],
    "answer": "The kangaroo drops from standing upright to all fours",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1455382321-640_adpp_is_reversed.mp4",
    "question": "What postural change does the kangaroo make in the video?",
    "candidates": [
      "The kangaroo drops from standing upright to all fours",
      "The kangaroo rises up from all fours to stand upright",
      "The kangaroo does not move"
    ],
    "answer": "The kangaroo rises up from all fours to stand upright",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1495060545-640_adpp_is.mp4",
    "question": "How does the woodlouse's body shape change?",
    "candidates": [
      "The woodlouse curls up into a tight ball",
      "The woodlouse uncurls and stretches out its body",
      "The woodlouse remains still"
    ],
    "answer": "The woodlouse uncurls and stretches out its body",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1495060545-640_adpp_is_reversed.mp4",
    "question": "How does the woodlouse's body shape change?",
    "candidates": [
      "The woodlouse curls up into a tight ball",
      "The woodlouse uncurls and stretches out its body",
      "The woodlouse remains still"
    ],
    "answer": "The woodlouse curls up into a tight ball",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2162933648-640_adpp_is.mp4",
    "question": "What change occurs in the cat's pupils?",
    "candidates": [
      "The cat's pupils constrict into vertical slits",
      "The cat's pupils dilate into large circles",
      "The cat's pupils remain unchanged"
    ],
    "answer": "The cat's pupils dilate into large circles",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2162933648-640_adpp_is_reversed.mp4",
    "question": "What change occurs in the cat's pupils?",
    "candidates": [
      "The cat's pupils constrict into vertical slits",
      "The cat's pupils dilate into large circles",
      "The cat's pupils remain unchanged"
    ],
    "answer": "The cat's pupils constrict into vertical slits",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2187793823-640_adpp_is.mp4",
    "question": "What neck movement does the giraffe make?",
    "candidates": [
      "The giraffe lowers its head to drink water",
      "The giraffe raises its head after drinking water",
      "The giraffe's head remains still"
    ],
    "answer": "The giraffe lowers its head to drink water",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2187793823-640_adpp_is_reversed.mp4",
    "question": "What neck movement does the giraffe make?",
    "candidates": [
      "The giraffe lowers its head to drink water",
      "The giraffe raises its head after drinking water",
      "The giraffe's head remains still"
    ],
    "answer": "The giraffe raises its head after drinking water",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2223538740-640_adpp_is.mp4",
    "question": "What neck movement does the horse make?",
    "candidates": [
      "The horse lowers its head to graze on grass",
      "The horse raises its head after finishing grazing",
      "The horse's head remains still"
    ],
    "answer": "The horse lowers its head to graze on grass",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2223538740-640_adpp_is_reversed.mp4",
    "question": "What neck movement does the horse make?",
    "candidates": [
      "The horse lowers its head to graze on grass",
      "The horse raises its head after finishing grazing",
      "The horse's head remains still"
    ],
    "answer": "The horse raises its head after finishing grazing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "34826-403777550_tiny.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "34826-403777550_tiny_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "855183-hd_1920_1080_25fps.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "855183-hd_1920_1080_25fps_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "855867-hd_1920_1080_30fps.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "855867-hd_1920_1080_30fps_reversed.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "856006-hd_1920_1080_part1.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "856006-hd_1920_1080_part1_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "856006-hd_1920_1080_part2.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Withering",
      "Staying still"
    ],
    "answer": "Withering",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "856006-hd_1920_1080_part2_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Withering",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "856030-hd_1920_1080_25fps.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "856030-hd_1920_1080_25fps_reversed.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-173045752-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-173045752-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-463333150-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-463333150-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-472601541-640_adpp_is.mp4",
    "question": "This is a video of a Mimosa pudica (sensitive plant). What is the state change of the plant?",
    "candidates": [
      "Its leaves are closing",
      "Its leaves are opening",
      "No change happened"
    ],
    "answer": "Its leaves are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-472601541-640_adpp_is_reversed.mp4",
    "question": "This is a video of a Mimosa pudica (sensitive plant). What is the state change of the plant?",
    "candidates": [
      "Its leaves are closing",
      "Its leaves are opening",
      "No change happened"
    ],
    "answer": "Its leaves are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-473221287-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-473221287-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-490993393-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-490993393-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-512962704-640_adpp_is.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-512962704-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-947988688-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-947988688-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-956021158-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-956021158-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-959918834-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-959918834-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1142846357-640_adpp_is.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1142846357-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1285434222-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1285434222-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1287355441-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1287355441-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1291371811-640_adpp_is.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1291371811-640_adpp_is_reversed.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1291391828-640_adpp_is.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1291391828-640_adpp_is_reversed.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1317701158-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1317701158-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1333210422-640_adpp_is.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1333210422-640_adpp_is_reversed.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1337095991-640_adpp_is.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1337095991-640_adpp_is_reversed.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1352716513-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1352716513-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1369195414-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1369195414-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1378048884-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1378048884-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1398207341-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1398207341-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1493882258-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1493882258-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1505075595-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1505075595-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1611832282-640_adpp_is.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-1611832282-640_adpp_is_reversed.mp4",
    "question": "This is a video of a Venus flytrap. What is the state change of the plant?",
    "candidates": [
      "The trap is closing",
      "The trap is opening",
      "No change happened"
    ],
    "answer": "The trap is opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2162241807-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2162241807-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2163427337-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2163427337-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2176054183-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2176054183-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2177266072-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2177266072-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2177345180-640_adpp_is_part1.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2177345180-640_adpp_is_part1_reversed.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2177345180-640_adpp_is_part2.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2177345180-640_adpp_is_part2_reversed.mp4",
    "question": "This is a time-lapse video of some flowers. What are the flowers doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2181947675-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2181947675-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2191475110-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2191475110-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2178854491-640_adpp_is.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Blooming",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2178854491-640_adpp_is_reversed.mp4",
    "question": "This is a time-lapse video of a flower. What is the flower doing?",
    "candidates": [
      "Blooming",
      "Furling",
      "Staying still"
    ],
    "answer": "Furling",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2204118516-640_adpp_is.mp4",
    "question": "This is a video of some Venus flytraps. What state change is shown?",
    "candidates": [
      "The traps are closing",
      "The traps are opening",
      "No change happened"
    ],
    "answer": "The traps are opening",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "istockphoto-2204118516-640_adpp_is_reversed.mp4",
    "question": "This is a video of some Venus flytraps. What state change is shown?",
    "candidates": [
      "The traps are closing",
      "The traps are opening",
      "No change happened"
    ],
    "answer": "The traps are closing",
    "source_category": "reversible_dynamics",
    "source_subcategory": "iStock"
  },
  {
    "video": "195051.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "195051_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "12454.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "12454_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "40642.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "40642_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "123891.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "123891_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "155006.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "155006_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "195673.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "195673_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "2819.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "2819_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "212276.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "212276_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "79967.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "79967_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "27141.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "27141_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "20726.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "20726_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "16224.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "16224_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "80491.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "80491_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "107791.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "107791_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "142963.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "142963_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "202564.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "202564_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "175715.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "175715_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "191006.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "191006_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "146962.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "146962_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "122584.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "122584_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "201604.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "201604_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "83778.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "83778_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "19953.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "19953_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "9152.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "9152_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "136067.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "136067_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "175642.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "175642_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "177542.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "177542_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "15038.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "15038_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "168348.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "168348_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "97818.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "97818_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "205562.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "205562_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "61122.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "61122_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "64817.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "64817_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "94733.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "94733_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "68496.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "68496_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "5873.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "5873_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "40877.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "uncovering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "40877_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "covering something",
      "uncovering something",
      "neither of the actions happened"
    ],
    "answer": "covering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "67287.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "67287_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "201535.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "201535_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "137056.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "137056_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "23995.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "23995_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "69583.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "69583_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "201854.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "201854_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "144615.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "144615_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "61437.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "61437_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "961.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "961_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "17149.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "17149_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "166637.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "166637_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "140929.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "140929_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "159969.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "159969_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "155526.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "155526_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "133202.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "133202_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "33170.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "33170_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "163710.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "163710_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "3304.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "3304_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "25869.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "25869_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "52497.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "52497_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "128892.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "128892_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "197774.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "197774_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "41457.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "41457_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "65211.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "65211_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "146990.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "146990_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "191802.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "191802_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "16038.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "16038_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "38879.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "38879_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "37426.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "37426_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "17916.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "17916_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "193439.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "193439_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "147266.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "147266_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "122910.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "122910_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "49722.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "closing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "49722_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening something",
      "closing something",
      "neither of the actions happened"
    ],
    "answer": "opening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "38989.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "38989_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "74945.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "74945_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "155524.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "155524_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "30918.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "30918_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "189193.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "189193_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "70751.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "70751_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "209512.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "209512_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "51253.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "51253_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "103377.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "103377_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "210559.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "210559_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "180301.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "180301_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "204628.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "204628_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "51999.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "51999_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "63719.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "63719_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "33419.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "33419_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "30588.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "30588_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "5270.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "dropping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "5270_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "picking something up",
      "dropping something",
      "neither of the actions happened"
    ],
    "answer": "picking something up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "42104.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "hiding something behind something else",
      "taking something from behind something else",
      "neither of the actions happened"
    ],
    "answer": "hiding something behind something else",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "42104_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "hiding something behind something else",
      "taking something from behind something else",
      "neither of the actions happened"
    ],
    "answer": "taking something from behind something else",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "6710.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "placing the star in front of the cup",
      "removing the star from in front of the cup",
      "neither of the actions happened"
    ],
    "answer": "placing the star in front of the cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "6710_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "placing the star in front of the cup",
      "removing the star from in front of the cup",
      "neither of the actions happened"
    ],
    "answer": "removing the star from in front of the cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "63218.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hiding the box behind the cup",
      "taking the box from behind the cup",
      "neither of the actions happened"
    ],
    "answer": "hiding the box behind the cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "63218_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hiding the box behind the cup",
      "taking the box from behind the cup",
      "neither of the actions happened"
    ],
    "answer": "taking the box from behind the cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "47727.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hiding the pen behind the cup",
      "taking the pen from behind the cup",
      "neither of the actions happened"
    ],
    "answer": "hiding the pen behind the cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "47727_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hiding the pen behind the cup",
      "taking the pen from behind the cup",
      "neither of the actions happened"
    ],
    "answer": "taking the pen from behind the cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "819.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "819_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "116146.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "116146_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "184866.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "184866_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "178579.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "178579_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "28606.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "28606_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "90178.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "90178_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "90563.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "90563_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "8956.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "8956_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "115480.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "115480_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "29861.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "29861_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "137162.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "137162_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "172312.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "172312_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "6303.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "6303_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "101552.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "101552_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "40616.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "40616_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "150756.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "150756_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "98297.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "98297_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "105854.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "105854_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "219868.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "219868_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "75931.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "75931_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "21829.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "21829_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "34355.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "34355_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "149192.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "unfolding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "149192_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "folding something",
      "unfolding something",
      "neither of the actions happened"
    ],
    "answer": "folding something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "51617.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "51617_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "211245.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "211245_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "220342.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "220342_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "196821.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "196821_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "213321.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "213321_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "126884.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "126884_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "193554.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "193554_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "103095.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "103095_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "122055.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "122055_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "140826.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "140826_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "44127.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pulling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "44127_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "pushing something",
      "pulling something",
      "neither of the actions happened"
    ],
    "answer": "pushing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "167837.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "167837_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "195213.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "195213_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "80122.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "80122_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "60020.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "60020_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "124924.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "124924_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "143756.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "143756_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "127452.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "127452_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "96047.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "96047_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "176005.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "176005_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "203487.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "203487_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "165248.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "165248_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "37037.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "37037_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "179725.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "179725_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "42457.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "42457_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "219699.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "219699_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "200312.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "lifting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "200312_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "lifting something",
      "throwing something",
      "neither of the actions happened"
    ],
    "answer": "throwing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "82786.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering the face with the phone",
      "uncovering the face by moving the phone away",
      "neither of the actions happened"
    ],
    "answer": "covering the face with the phone",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "82786_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering the face with the phone",
      "uncovering the face by moving the phone away",
      "neither of the actions happened"
    ],
    "answer": "uncovering the face by moving the phone away",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "11493.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "placing the toy in front of the remote control",
      "removing the toy from in front of the remote control",
      "neither of the actions happened"
    ],
    "answer": "placing the toy in front of the remote control",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "11493_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "placing the toy in front of the remote control",
      "removing the toy from in front of the remote control",
      "neither of the actions happened"
    ],
    "answer": "removing the toy from in front of the remote control",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "179308.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "placing the tablet in front of the laptop",
      "removing the tablet from in front of the laptop",
      "neither of the actions happened"
    ],
    "answer": "placing the tablet in front of the laptop",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "179308_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "placing the tablet in front of the laptop",
      "removing the tablet from in front of the laptop",
      "neither of the actions happened"
    ],
    "answer": "removing the tablet from in front of the laptop",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080002.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080002_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080004.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080004_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080006.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080006_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080007.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080007_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080008.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080008_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080011.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080011_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080012.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080012_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080014.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080014_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080015.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080015_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080019.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080019_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080101.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080101_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080107.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080107_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080115.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080115_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080117.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "unplugging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01080117_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "plugging in something",
      "unplugging something",
      "neither of the actions happened"
    ],
    "answer": "plugging in something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090001.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090001_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090005.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090005_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090007.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090007_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090008.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090008_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090009.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090009_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090010.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090010_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090016.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090016_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090017.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090017_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090100.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "unzipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01090100_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "zipping something",
      "unzipping something",
      "neither of the actions happened"
    ],
    "answer": "zipping something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100002.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100002_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100005.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100005_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100008.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100008_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100009.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100009_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100011.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100011_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100012.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100012_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100016.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100016_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100018.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "rolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01100018_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "rolling something",
      "unrolling something",
      "neither of the actions happened"
    ],
    "answer": "unrolling something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120001.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120001_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120003.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120003_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120004.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120004_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120007.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120007_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120009.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120009_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120015.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120015_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120018.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120018_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120101.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "retracting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01120101_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "extending something",
      "retracting something",
      "neither of the actions happened"
    ],
    "answer": "extending something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130005.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "fastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130005_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "unfastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130008.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "fastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130008_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "unfastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130011.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "fastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130011_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "unfastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130015.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "fastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01130015_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "fastening something",
      "unfastening something",
      "neither of the actions happened"
    ],
    "answer": "unfastening something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140000.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140000_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140001.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140001_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140003.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140003_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140004.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140004_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140009.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140009_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140014.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140014_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140016.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140016_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140019.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "hanging something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01140019_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "hanging something",
      "taking down something",
      "neither of the actions happened"
    ],
    "answer": "taking down something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150001.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something on",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150001_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something off",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150003.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something on",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150003_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something off",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150006.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something on",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150006_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something off",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150013.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something on",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01150013_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning something on",
      "turning something off",
      "neither of the actions happened"
    ],
    "answer": "turning something off",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160000.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160000_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160001.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160001_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160003.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160003_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160006.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160006_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160008.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160008_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160012.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160012_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160013.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160013_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160015.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160015_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160016.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160016_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160100.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160100_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160101.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160101_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160102.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160102_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160104.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160104_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160107.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160107_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160108.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting out of/off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01160108_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "getting in/on something",
      "getting out of/off something",
      "neither of the actions happened"
    ],
    "answer": "getting in/on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170002.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170002_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170003.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170003_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170006.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170006_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170008.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170008_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170010.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170010_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170012.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170012_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170013.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170013_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170014.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170014_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170018.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170018_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170100.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "taking off something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01170100_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "putting on something",
      "taking off something",
      "neither of the actions happened"
    ],
    "answer": "putting on something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180001.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180001_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180003.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180003_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180004.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180004_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180005.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180005_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180006.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180006_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180008.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180008_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180010.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180010_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180012.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180012_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180013.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180013_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180015.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180015_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180016.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180016_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180019.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "raising something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01180019_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "raising something",
      "lowering something",
      "neither of the actions happened"
    ],
    "answer": "lowering something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190003.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "inserting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190003_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "removing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190004.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "inserting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190004_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "removing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190005.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "inserting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190005_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "removing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190013.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "inserting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190013_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "removing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190017.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "inserting something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01190017_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "inserting something",
      "removing something",
      "neither of the actions happened"
    ],
    "answer": "removing something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200001.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200001_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200002.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200002_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200004.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200004_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200006.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200006_reversed.mp4",
    "question": "Which one of these actions happened in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200007.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200007_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200009.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200009_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200010.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200010_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200014.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200014_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200015.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200015_reversed.mp4",
    "question": "Which one of these actions can be seen in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200017.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200017_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200018.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "stacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "01200018_reversed.mp4",
    "question": "Which action from below was featured in the video?",
    "candidates": [
      "stacking something",
      "unstacking something",
      "neither of the actions happened"
    ],
    "answer": "unstacking something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "MHBench"
  },
  {
    "video": "102287.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving apple and packet closer to each other",
      "moving apple and packet away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving apple and packet closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "102287_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving apple and packet closer to each other",
      "moving apple and packet away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving apple and packet away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "102340.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening lunch bag",
      "closing lunch bag",
      "neither of the actions happened"
    ],
    "answer": "opening lunch bag",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "102340_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening lunch bag",
      "closing lunch bag",
      "neither of the actions happened"
    ],
    "answer": "closing lunch bag",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "103226.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pendrive",
      "turning the camera downwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "103226_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pendrive",
      "turning the camera downwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "103283.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing funnel from left to right",
      "pulling funnel from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing funnel from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "103283_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing funnel from left to right",
      "pulling funnel from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling funnel from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "105023.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling soap from right to left",
      "pushing soap from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling soap from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "105023_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling soap from right to left",
      "pushing soap from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing soap from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106072.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling pencil from right to left",
      "pushing pencil from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling pencil from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106072_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling pencil from right to left",
      "pushing pencil from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing pencil from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106286.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming tv control",
      "turning the camera left while filming tv control",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming tv control",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106286_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming tv control",
      "turning the camera left while filming tv control",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming tv control",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106374.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking coin purse out of draw",
      "putting coin purse into draw",
      "neither of the actions happened"
    ],
    "answer": "taking coin purse out of draw",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106374_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking coin purse out of draw",
      "putting coin purse into draw",
      "neither of the actions happened"
    ],
    "answer": "putting coin purse into draw",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106617.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming purple plastic triangular object",
      "turning the camera upwards while filming purple plastic triangular object",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming purple plastic triangular object",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "106617_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming purple plastic triangular object",
      "turning the camera upwards while filming purple plastic triangular object",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming purple plastic triangular object",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "107026.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cup away from the camera",
      "moving cup towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving cup away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "107026_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cup away from the camera",
      "moving cup towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving cup towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "107033.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming tv control",
      "turning the camera right while filming tv control",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming tv control",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "107033_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming tv control",
      "turning the camera right while filming tv control",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming tv control",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "107514.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving earphones away from the camera",
      "moving earphones towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving earphones away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "107514_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving earphones away from the camera",
      "moving earphones towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving earphones towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "108244.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving magnifying glass away from the camera",
      "moving magnifying glass towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving magnifying glass away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "108244_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving magnifying glass away from the camera",
      "moving magnifying glass towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving magnifying glass towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "108529.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming fork",
      "turning the camera downwards while filming fork",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming fork",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "108529_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming fork",
      "turning the camera downwards while filming fork",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming fork",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "109168.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling travel bag from right to left",
      "pushing travel bag from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling travel bag from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "109168_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling travel bag from right to left",
      "pushing travel bag from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing travel bag from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "1096.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a bolt away from a washer",
      "moving a bolt closer to a washer",
      "neither of the actions happened"
    ],
    "answer": "moving a bolt away from a washer",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "1096_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a bolt away from a washer",
      "moving a bolt closer to a washer",
      "neither of the actions happened"
    ],
    "answer": "moving a bolt closer to a washer",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "111061.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving coin towards the camera",
      "moving coin away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving coin towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "111061_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving coin towards the camera",
      "moving coin away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving coin away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "111930.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering mascara",
      "covering mascara with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering mascara",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "111930_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering mascara",
      "covering mascara with something",
      "neither of the actions happened"
    ],
    "answer": "covering mascara with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "112337.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling the toothpaste tube from right to left",
      "pushing the toothpaste tube from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling the toothpaste tube from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "112337_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling the toothpaste tube from right to left",
      "pushing the toothpaste tube from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing the toothpaste tube from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "11287.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving banana up",
      "moving banana down",
      "neither of the actions happened"
    ],
    "answer": "moving banana up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "11287_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving banana up",
      "moving banana down",
      "neither of the actions happened"
    ],
    "answer": "moving banana down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "113425.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving card reader away from filter",
      "moving card reader closer to filter",
      "neither of the actions happened"
    ],
    "answer": "moving card reader away from filter",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "113425_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving card reader away from filter",
      "moving card reader closer to filter",
      "neither of the actions happened"
    ],
    "answer": "moving card reader closer to filter",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "113881.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing box",
      "opening box",
      "neither of the actions happened"
    ],
    "answer": "closing box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "113881_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing box",
      "opening box",
      "neither of the actions happened"
    ],
    "answer": "opening box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "113899.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking tennis shoes out of rack",
      "putting tennis shoes into rack",
      "neither of the actions happened"
    ],
    "answer": "taking tennis shoes out of rack",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "113899_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking tennis shoes out of rack",
      "putting tennis shoes into rack",
      "neither of the actions happened"
    ],
    "answer": "putting tennis shoes into rack",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "115711.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving hand mirror towards the camera",
      "moving hand mirror away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving hand mirror towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "115711_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving hand mirror towards the camera",
      "moving hand mirror away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving hand mirror away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "11753.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving tooth paste and pen closer to each other",
      "moving tooth paste and pen away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving tooth paste and pen closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "11753_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving tooth paste and pen closer to each other",
      "moving tooth paste and pen away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving tooth paste and pen away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "118278.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting headphones into box",
      "taking headphones out of box",
      "neither of the actions happened"
    ],
    "answer": "putting headphones into box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "118278_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting headphones into box",
      "taking headphones out of box",
      "neither of the actions happened"
    ],
    "answer": "taking headphones out of box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "119088.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging deodorant can out of blanket",
      "burying deodorant can in blanket",
      "neither of the actions happened"
    ],
    "answer": "digging deodorant can out of blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "119088_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging deodorant can out of blanket",
      "burying deodorant can in blanket",
      "neither of the actions happened"
    ],
    "answer": "burying deodorant can in blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "119105.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming glasses",
      "turning the camera right while filming glasses",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming glasses",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "119105_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming glasses",
      "turning the camera right while filming glasses",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming glasses",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "119698.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving sunglasses away from cassette",
      "moving sunglasses closer to cassette",
      "neither of the actions happened"
    ],
    "answer": "moving sunglasses away from cassette",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "119698_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving sunglasses away from cassette",
      "moving sunglasses closer to cassette",
      "neither of the actions happened"
    ],
    "answer": "moving sunglasses closer to cassette",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120276.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving specs cleanr closer to dress whitener",
      "moving specs cleanr away from dress whitener",
      "neither of the actions happened"
    ],
    "answer": "moving specs cleanr closer to dress whitener",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120276_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving specs cleanr closer to dress whitener",
      "moving specs cleanr away from dress whitener",
      "neither of the actions happened"
    ],
    "answer": "moving specs cleanr away from dress whitener",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120457.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering a screwdriver with a peice of paper",
      "uncovering a screwdriver",
      "neither of the actions happened"
    ],
    "answer": "covering a screwdriver with a peice of paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120457_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering a screwdriver with a peice of paper",
      "uncovering a screwdriver",
      "neither of the actions happened"
    ],
    "answer": "uncovering a screwdriver",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120544.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a ring from left to right",
      "pushing a ring from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling a ring from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120544_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a ring from left to right",
      "pushing a ring from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing a ring from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120664.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from plastic glasses with your camera",
      "approaching plastic glasses with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from plastic glasses with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "120664_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from plastic glasses with your camera",
      "approaching plastic glasses with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching plastic glasses with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "122594.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving diet coke can and sprite can closer to each other",
      "moving diet coke can and sprite can away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving diet coke can and sprite can closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "122594_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving diet coke can and sprite can closer to each other",
      "moving diet coke can and sprite can away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving diet coke can and sprite can away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "12296.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging nail cutter out of thermocol balls",
      "burying nail cutter in thermocol balls",
      "neither of the actions happened"
    ],
    "answer": "digging nail cutter out of thermocol balls",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "12296_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging nail cutter out of thermocol balls",
      "burying nail cutter in thermocol balls",
      "neither of the actions happened"
    ],
    "answer": "burying nail cutter in thermocol balls",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "123155.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing salt pot",
      "opening salt pot",
      "neither of the actions happened"
    ],
    "answer": "closing salt pot",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "123155_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing salt pot",
      "opening salt pot",
      "neither of the actions happened"
    ],
    "answer": "opening salt pot",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "123197.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting stuffed kitten into coffee mug",
      "taking stuffed kitten out of coffee mug",
      "neither of the actions happened"
    ],
    "answer": "putting stuffed kitten into coffee mug",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "123197_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting stuffed kitten into coffee mug",
      "taking stuffed kitten out of coffee mug",
      "neither of the actions happened"
    ],
    "answer": "taking stuffed kitten out of coffee mug",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "124659.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from brush with your camera",
      "approaching brush with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from brush with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "124659_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from brush with your camera",
      "approaching brush with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching brush with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125046.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting a cotton bud stick into the container",
      "taking a cotton bud stick out of the container",
      "neither of the actions happened"
    ],
    "answer": "putting a cotton bud stick into the container",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125046_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting a cotton bud stick into the container",
      "taking a cotton bud stick out of the container",
      "neither of the actions happened"
    ],
    "answer": "taking a cotton bud stick out of the container",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125616.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pendrive",
      "turning the camera downwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125616_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pendrive",
      "turning the camera downwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125646.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering earpick",
      "covering earpick with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering earpick",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125646_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering earpick",
      "covering earpick with something",
      "neither of the actions happened"
    ],
    "answer": "covering earpick with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125683.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering water bottle with newspaper",
      "uncovering water bottle",
      "neither of the actions happened"
    ],
    "answer": "covering water bottle with newspaper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "125683_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering water bottle with newspaper",
      "uncovering water bottle",
      "neither of the actions happened"
    ],
    "answer": "uncovering water bottle",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "126666.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying grape fruit in blanket",
      "digging grape fruit out of blanket",
      "neither of the actions happened"
    ],
    "answer": "burying grape fruit in blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "126666_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying grape fruit in blanket",
      "digging grape fruit out of blanket",
      "neither of the actions happened"
    ],
    "answer": "digging grape fruit out of blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "127244.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering mobile",
      "covering mobile with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering mobile",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "127244_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering mobile",
      "covering mobile with something",
      "neither of the actions happened"
    ],
    "answer": "covering mobile with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "12857.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming a media console",
      "turning the camera right while filming a media console",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming a media console",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "12857_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming a media console",
      "turning the camera right while filming a media console",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming a media console",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "129040.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming cfl bulb",
      "turning the camera downwards while filming cfl bulb",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming cfl bulb",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "129040_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming cfl bulb",
      "turning the camera downwards while filming cfl bulb",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming cfl bulb",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "129312.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening drawer",
      "closing drawer",
      "neither of the actions happened"
    ],
    "answer": "opening drawer",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "129312_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening drawer",
      "closing drawer",
      "neither of the actions happened"
    ],
    "answer": "closing drawer",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "131058.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a business card up",
      "moving a business card down",
      "neither of the actions happened"
    ],
    "answer": "moving a business card up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "131058_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a business card up",
      "moving a business card down",
      "neither of the actions happened"
    ],
    "answer": "moving a business card down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "131855.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting usb mouse into bowl",
      "taking usb mouse out of bowl",
      "neither of the actions happened"
    ],
    "answer": "putting usb mouse into bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "131855_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting usb mouse into bowl",
      "taking usb mouse out of bowl",
      "neither of the actions happened"
    ],
    "answer": "taking usb mouse out of bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "132098.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing tissue from right to left",
      "pulling tissue from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing tissue from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "132098_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing tissue from right to left",
      "pulling tissue from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling tissue from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "137530.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving knife down",
      "moving knife up",
      "neither of the actions happened"
    ],
    "answer": "moving knife down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "137530_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving knife down",
      "moving knife up",
      "neither of the actions happened"
    ],
    "answer": "moving knife up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "13766.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing lipstick",
      "opening lipstick",
      "neither of the actions happened"
    ],
    "answer": "closing lipstick",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "13766_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing lipstick",
      "opening lipstick",
      "neither of the actions happened"
    ],
    "answer": "opening lipstick",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "13801.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding paper",
      "folding paper",
      "neither of the actions happened"
    ],
    "answer": "unfolding paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "13801_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding paper",
      "folding paper",
      "neither of the actions happened"
    ],
    "answer": "folding paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "138607.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching modem device with your camera",
      "moving away from modem device with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching modem device with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "138607_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching modem device with your camera",
      "moving away from modem device with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from modem device with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "139400.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling park avenue perfume spray from left to right",
      "pushing park avenue perfume spray from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling park avenue perfume spray from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "139400_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling park avenue perfume spray from left to right",
      "pushing park avenue perfume spray from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing park avenue perfume spray from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "139426.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching a bush with your camera",
      "moving away from a bush with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching a bush with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "139426_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching a bush with your camera",
      "moving away from a bush with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from a bush with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "139724.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cap towards the camera",
      "moving cap away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving cap towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "139724_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cap towards the camera",
      "moving cap away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving cap away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "140146.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving coin away from flash drive",
      "moving coin closer to flash drive",
      "neither of the actions happened"
    ],
    "answer": "moving coin away from flash drive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "140146_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving coin away from flash drive",
      "moving coin closer to flash drive",
      "neither of the actions happened"
    ],
    "answer": "moving coin closer to flash drive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "140199.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from watches with your camera",
      "approaching watches with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from watches with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "140199_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from watches with your camera",
      "approaching watches with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching watches with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "141146.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing wallet from left to right",
      "pulling wallet from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing wallet from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "141146_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing wallet from left to right",
      "pulling wallet from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling wallet from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "144842.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving water bottle towards the camera",
      "moving water bottle away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving water bottle towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "144842_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving water bottle towards the camera",
      "moving water bottle away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving water bottle away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "145545.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pendrive",
      "turning the camera downwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "145545_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pendrive",
      "turning the camera downwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "145883.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a plastic coffee cup closer to a flask",
      "moving a plastic coffee cup away from a flask",
      "neither of the actions happened"
    ],
    "answer": "moving a plastic coffee cup closer to a flask",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "145883_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a plastic coffee cup closer to a flask",
      "moving a plastic coffee cup away from a flask",
      "neither of the actions happened"
    ],
    "answer": "moving a plastic coffee cup away from a flask",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "145919.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling park avenue perfume spray from left to right",
      "pushing park avenue perfume spray from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling park avenue perfume spray from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "145919_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling park avenue perfume spray from left to right",
      "pushing park avenue perfume spray from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing park avenue perfume spray from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "146537.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering color pencils",
      "covering color pencils with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering color pencils",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "146537_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering color pencils",
      "covering color pencils with something",
      "neither of the actions happened"
    ],
    "answer": "covering color pencils with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "146582.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving scissors and cigarette box away from each other",
      "moving scissors and cigarette box closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving scissors and cigarette box away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "146582_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving scissors and cigarette box away from each other",
      "moving scissors and cigarette box closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving scissors and cigarette box closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "146884.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming the floor",
      "turning the camera left while filming the floor",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming the floor",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "146884_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming the floor",
      "turning the camera left while filming the floor",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming the floor",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "148019.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving fork and water bottle cap away from each other",
      "moving fork and water bottle cap closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving fork and water bottle cap away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "148019_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving fork and water bottle cap away from each other",
      "moving fork and water bottle cap closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving fork and water bottle cap closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "148568.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding trousers",
      "unfolding trousers",
      "neither of the actions happened"
    ],
    "answer": "folding trousers",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "148568_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding trousers",
      "unfolding trousers",
      "neither of the actions happened"
    ],
    "answer": "unfolding trousers",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "14908.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering cup with towel",
      "uncovering cup",
      "neither of the actions happened"
    ],
    "answer": "covering cup with towel",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "14908_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering cup with towel",
      "uncovering cup",
      "neither of the actions happened"
    ],
    "answer": "uncovering cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "150371.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming cup",
      "turning the camera right while filming cup",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "150371_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming cup",
      "turning the camera right while filming cup",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "150646.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing cleaning wipes from right to left",
      "pulling cleaning wipes from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing cleaning wipes from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "150646_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing cleaning wipes from right to left",
      "pulling cleaning wipes from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling cleaning wipes from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "150654.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving drumstick up",
      "moving drumstick down",
      "neither of the actions happened"
    ],
    "answer": "moving drumstick up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "150654_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving drumstick up",
      "moving drumstick down",
      "neither of the actions happened"
    ],
    "answer": "moving drumstick down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "15141.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking screwdriver out of blue bowl",
      "putting screwdriver into blue bowl",
      "neither of the actions happened"
    ],
    "answer": "taking screwdriver out of blue bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "15141_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking screwdriver out of blue bowl",
      "putting screwdriver into blue bowl",
      "neither of the actions happened"
    ],
    "answer": "putting screwdriver into blue bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "151619.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a pillow closer to television",
      "moving a pillow away from television",
      "neither of the actions happened"
    ],
    "answer": "moving a pillow closer to television",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "151619_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a pillow closer to television",
      "moving a pillow away from television",
      "neither of the actions happened"
    ],
    "answer": "moving a pillow away from television",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "152098.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a hat down",
      "moving a hat up",
      "neither of the actions happened"
    ],
    "answer": "moving a hat down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "152098_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a hat down",
      "moving a hat up",
      "neither of the actions happened"
    ],
    "answer": "moving a hat up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "152390.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening box",
      "closing box",
      "neither of the actions happened"
    ],
    "answer": "opening box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "152390_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening box",
      "closing box",
      "neither of the actions happened"
    ],
    "answer": "closing box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "153143.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming wrist watch",
      "turning the camera upwards while filming wrist watch",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming wrist watch",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "153143_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming wrist watch",
      "turning the camera upwards while filming wrist watch",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming wrist watch",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154085.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothbrush closer to too",
      "moving toothbrush away from too",
      "neither of the actions happened"
    ],
    "answer": "moving toothbrush closer to too",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154085_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothbrush closer to too",
      "moving toothbrush away from too",
      "neither of the actions happened"
    ],
    "answer": "moving toothbrush away from too",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154196.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothbrush away from puncher",
      "moving toothbrush closer to puncher",
      "neither of the actions happened"
    ],
    "answer": "moving toothbrush away from puncher",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154196_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothbrush away from puncher",
      "moving toothbrush closer to puncher",
      "neither of the actions happened"
    ],
    "answer": "moving toothbrush closer to puncher",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154558.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a cup down",
      "moving a cup up",
      "neither of the actions happened"
    ],
    "answer": "moving a cup down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154558_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a cup down",
      "moving a cup up",
      "neither of the actions happened"
    ],
    "answer": "moving a cup up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154754.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving lipstick away from the camera",
      "moving lipstick towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving lipstick away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "154754_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving lipstick away from the camera",
      "moving lipstick towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving lipstick towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "155398.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting a pen into a cup",
      "taking a pen out of a cup",
      "neither of the actions happened"
    ],
    "answer": "putting a pen into a cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "155398_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting a pen into a cup",
      "taking a pen out of a cup",
      "neither of the actions happened"
    ],
    "answer": "taking a pen out of a cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "155554.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from hair oil with your camera",
      "approaching hair oil with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from hair oil with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "155554_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from hair oil with your camera",
      "approaching hair oil with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching hair oil with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "157537.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving eraser and ball away from each other",
      "moving eraser and ball closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving eraser and ball away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "157537_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving eraser and ball away from each other",
      "moving eraser and ball closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving eraser and ball closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "158170.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking cough medicine out of bowl",
      "putting cough medicine into bowl",
      "neither of the actions happened"
    ],
    "answer": "taking cough medicine out of bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "158170_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking cough medicine out of bowl",
      "putting cough medicine into bowl",
      "neither of the actions happened"
    ],
    "answer": "putting cough medicine into bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "158479.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from watches with your camera",
      "approaching watches with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from watches with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "158479_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from watches with your camera",
      "approaching watches with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching watches with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "159881.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving tumbler and keychain closer to each other",
      "moving tumbler and keychain away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving tumbler and keychain closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "159881_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving tumbler and keychain closer to each other",
      "moving tumbler and keychain away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving tumbler and keychain away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "160602.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting sd adapter into disposable cup",
      "taking sd adapter out of disposable cup",
      "neither of the actions happened"
    ],
    "answer": "putting sd adapter into disposable cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "160602_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting sd adapter into disposable cup",
      "taking sd adapter out of disposable cup",
      "neither of the actions happened"
    ],
    "answer": "taking sd adapter out of disposable cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "162047.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging cream tube out of blanket",
      "burying cream tube in blanket",
      "neither of the actions happened"
    ],
    "answer": "digging cream tube out of blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "162047_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging cream tube out of blanket",
      "burying cream tube in blanket",
      "neither of the actions happened"
    ],
    "answer": "burying cream tube in blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "162158.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding matress",
      "folding matress",
      "neither of the actions happened"
    ],
    "answer": "unfolding matress",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "162158_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding matress",
      "folding matress",
      "neither of the actions happened"
    ],
    "answer": "folding matress",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "162808.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening a book",
      "closing a book",
      "neither of the actions happened"
    ],
    "answer": "opening a book",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "162808_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening a book",
      "closing a book",
      "neither of the actions happened"
    ],
    "answer": "closing a book",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "16298.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving puncher closer to scissor",
      "moving puncher away from scissor",
      "neither of the actions happened"
    ],
    "answer": "moving puncher closer to scissor",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "16298_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving puncher closer to scissor",
      "moving puncher away from scissor",
      "neither of the actions happened"
    ],
    "answer": "moving puncher away from scissor",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "163155.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a toilet papper closer to a cd",
      "moving a toilet papper away from a cd",
      "neither of the actions happened"
    ],
    "answer": "moving a toilet papper closer to a cd",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "163155_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a toilet papper closer to a cd",
      "moving a toilet papper away from a cd",
      "neither of the actions happened"
    ],
    "answer": "moving a toilet papper away from a cd",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "164286.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing hair trimmer from left to right",
      "pulling hair trimmer from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing hair trimmer from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "164286_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing hair trimmer from left to right",
      "pulling hair trimmer from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling hair trimmer from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "165607.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding a ticket",
      "unfolding a ticket",
      "neither of the actions happened"
    ],
    "answer": "folding a ticket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "165607_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding a ticket",
      "unfolding a ticket",
      "neither of the actions happened"
    ],
    "answer": "unfolding a ticket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "166114.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching ball with your camera",
      "moving away from ball with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching ball with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "166114_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching ball with your camera",
      "moving away from ball with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from ball with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "1664.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling cup from left to right",
      "pushing cup from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling cup from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "1664_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling cup from left to right",
      "pushing cup from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing cup from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "167157.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking a cookie out of a jar",
      "putting a cookie into a jar",
      "neither of the actions happened"
    ],
    "answer": "taking a cookie out of a jar",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "167157_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking a cookie out of a jar",
      "putting a cookie into a jar",
      "neither of the actions happened"
    ],
    "answer": "putting a cookie into a jar",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "169216.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling candle from left to right",
      "pushing candle from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling candle from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "169216_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling candle from left to right",
      "pushing candle from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing candle from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "16955.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming scissors",
      "turning the camera right while filming scissors",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming scissors",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "16955_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming scissors",
      "turning the camera right while filming scissors",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming scissors",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "170709.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving pendrive and watch away from each other",
      "moving pendrive and watch closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving pendrive and watch away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "170709_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving pendrive and watch away from each other",
      "moving pendrive and watch closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving pendrive and watch closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "172868.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening laptop",
      "closing laptop",
      "neither of the actions happened"
    ],
    "answer": "opening laptop",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "172868_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening laptop",
      "closing laptop",
      "neither of the actions happened"
    ],
    "answer": "closing laptop",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "173018.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting note book into box",
      "taking note book out of box",
      "neither of the actions happened"
    ],
    "answer": "putting note book into box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "173018_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting note book into box",
      "taking note book out of box",
      "neither of the actions happened"
    ],
    "answer": "taking note book out of box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "174787.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a orange away from another orange",
      "moving a orange closer to another orange",
      "neither of the actions happened"
    ],
    "answer": "moving a orange away from another orange",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "174787_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a orange away from another orange",
      "moving a orange closer to another orange",
      "neither of the actions happened"
    ],
    "answer": "moving a orange closer to another orange",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "176807.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming a watch",
      "turning the camera upwards while filming a watch",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming a watch",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "176807_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming a watch",
      "turning the camera upwards while filming a watch",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming a watch",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "176896.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing paper from left to right",
      "pulling paper from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing paper from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "176896_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing paper from left to right",
      "pulling paper from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling paper from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "17698.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering cable",
      "covering cable with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering cable",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "17698_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering cable",
      "covering cable with something",
      "neither of the actions happened"
    ],
    "answer": "covering cable with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "179490.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a button away from a seashell",
      "moving a button closer to a seashell",
      "neither of the actions happened"
    ],
    "answer": "moving a button away from a seashell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "179490_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a button away from a seashell",
      "moving a button closer to a seashell",
      "neither of the actions happened"
    ],
    "answer": "moving a button closer to a seashell",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180511.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving tooth brush closer to earphone",
      "moving tooth brush away from earphone",
      "neither of the actions happened"
    ],
    "answer": "moving tooth brush closer to earphone",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180511_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving tooth brush closer to earphone",
      "moving tooth brush away from earphone",
      "neither of the actions happened"
    ],
    "answer": "moving tooth brush away from earphone",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180840.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving an orange and an orange away from each other",
      "moving an orange and an orange closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving an orange and an orange away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180840_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving an orange and an orange away from each other",
      "moving an orange and an orange closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving an orange and an orange closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180854.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving hair band away from tv remote",
      "moving hair band closer to tv remote",
      "neither of the actions happened"
    ],
    "answer": "moving hair band away from tv remote",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180854_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving hair band away from tv remote",
      "moving hair band closer to tv remote",
      "neither of the actions happened"
    ],
    "answer": "moving hair band closer to tv remote",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180929.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a car and a motorbike closer to each other",
      "moving a car and a motorbike away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving a car and a motorbike closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "180929_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a car and a motorbike closer to each other",
      "moving a car and a motorbike away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving a car and a motorbike away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "181725.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving electic razor away from subscription note",
      "moving electic razor closer to subscription note",
      "neither of the actions happened"
    ],
    "answer": "moving electic razor away from subscription note",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "181725_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving electic razor away from subscription note",
      "moving electic razor closer to subscription note",
      "neither of the actions happened"
    ],
    "answer": "moving electic razor closer to subscription note",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "181862.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving spoon down",
      "moving spoon up",
      "neither of the actions happened"
    ],
    "answer": "moving spoon down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "181862_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving spoon down",
      "moving spoon up",
      "neither of the actions happened"
    ],
    "answer": "moving spoon up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "182814.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from chalk piece with your camera",
      "approaching chalk piece with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from chalk piece with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "182814_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from chalk piece with your camera",
      "approaching chalk piece with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching chalk piece with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "183356.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing mobile phone battery from right to left",
      "pulling mobile phone battery from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing mobile phone battery from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "183356_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing mobile phone battery from right to left",
      "pulling mobile phone battery from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling mobile phone battery from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "18361.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing a vessel",
      "opening a vessel",
      "neither of the actions happened"
    ],
    "answer": "closing a vessel",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "18361_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing a vessel",
      "opening a vessel",
      "neither of the actions happened"
    ],
    "answer": "opening a vessel",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "185473.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling carton chess box from left to right",
      "pushing carton chess box from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling carton chess box from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "185473_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling carton chess box from left to right",
      "pushing carton chess box from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing carton chess box from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "187727.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering paperbox",
      "covering paperbox with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering paperbox",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "187727_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering paperbox",
      "covering paperbox with something",
      "neither of the actions happened"
    ],
    "answer": "covering paperbox with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "187822.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cosco ball away from yippee noodles packet",
      "moving cosco ball closer to yippee noodles packet",
      "neither of the actions happened"
    ],
    "answer": "moving cosco ball away from yippee noodles packet",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "187822_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cosco ball away from yippee noodles packet",
      "moving cosco ball closer to yippee noodles packet",
      "neither of the actions happened"
    ],
    "answer": "moving cosco ball closer to yippee noodles packet",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "18879.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing glasses from left to right",
      "pulling glasses from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing glasses from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "18879_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing glasses from left to right",
      "pulling glasses from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling glasses from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "189572.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving bottle away from the camera",
      "moving bottle towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving bottle away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "189572_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving bottle away from the camera",
      "moving bottle towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving bottle towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "189619.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming a towel rod",
      "turning the camera left while filming a towel rod",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming a towel rod",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "189619_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming a towel rod",
      "turning the camera left while filming a towel rod",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming a towel rod",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "189734.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking ring out of box",
      "putting ring into box",
      "neither of the actions happened"
    ],
    "answer": "taking ring out of box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "189734_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking ring out of box",
      "putting ring into box",
      "neither of the actions happened"
    ],
    "answer": "putting ring into box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "191455.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing oven",
      "opening oven",
      "neither of the actions happened"
    ],
    "answer": "closing oven",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "191455_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing oven",
      "opening oven",
      "neither of the actions happened"
    ],
    "answer": "opening oven",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192079.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving room freshener and wallet closer to each other",
      "moving room freshener and wallet away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving room freshener and wallet closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192079_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving room freshener and wallet closer to each other",
      "moving room freshener and wallet away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving room freshener and wallet away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192245.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding saree",
      "folding saree",
      "neither of the actions happened"
    ],
    "answer": "unfolding saree",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192245_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding saree",
      "folding saree",
      "neither of the actions happened"
    ],
    "answer": "folding saree",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192394.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding paper",
      "unfolding paper",
      "neither of the actions happened"
    ],
    "answer": "folding paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192394_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding paper",
      "unfolding paper",
      "neither of the actions happened"
    ],
    "answer": "unfolding paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192460.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a text marker and a lens closer to each other",
      "moving a text marker and a lens away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving a text marker and a lens closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192460_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a text marker and a lens closer to each other",
      "moving a text marker and a lens away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving a text marker and a lens away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192518.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming scissors",
      "turning the camera upwards while filming scissors",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming scissors",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "192518_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming scissors",
      "turning the camera upwards while filming scissors",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming scissors",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "193178.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving plant away from the camera",
      "moving plant towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving plant away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "193178_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving plant away from the camera",
      "moving plant towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving plant towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "19468.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toy towards the camera",
      "moving toy away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving toy towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "19468_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toy towards the camera",
      "moving toy away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving toy away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "19482.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving hdmi cable and pc memory closer to each other",
      "moving hdmi cable and pc memory away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving hdmi cable and pc memory closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "19482_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving hdmi cable and pc memory closer to each other",
      "moving hdmi cable and pc memory away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving hdmi cable and pc memory away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "195299.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing cable from right to left",
      "pulling cable from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing cable from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "195299_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing cable from right to left",
      "pulling cable from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling cable from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "195999.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving pen down",
      "moving pen up",
      "neither of the actions happened"
    ],
    "answer": "moving pen down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "195999_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving pen down",
      "moving pen up",
      "neither of the actions happened"
    ],
    "answer": "moving pen up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "196507.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming tape measure",
      "turning the camera downwards while filming tape measure",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming tape measure",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "196507_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming tape measure",
      "turning the camera downwards while filming tape measure",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming tape measure",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "199658.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a jug towards the camera",
      "moving a jug away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving a jug towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "199658_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a jug towards the camera",
      "moving a jug away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving a jug away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "199661.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling green pencil from left to right",
      "pushing green pencil from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling green pencil from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "199661_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling green pencil from left to right",
      "pushing green pencil from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing green pencil from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "200883.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing a bottle",
      "opening a bottle",
      "neither of the actions happened"
    ],
    "answer": "closing a bottle",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "200883_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing a bottle",
      "opening a bottle",
      "neither of the actions happened"
    ],
    "answer": "opening a bottle",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "200903.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving blue colour pencil sharpner down",
      "moving blue colour pencil sharpner up",
      "neither of the actions happened"
    ],
    "answer": "moving blue colour pencil sharpner down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "200903_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving blue colour pencil sharpner down",
      "moving blue colour pencil sharpner up",
      "neither of the actions happened"
    ],
    "answer": "moving blue colour pencil sharpner up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "201151.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening container",
      "closing container",
      "neither of the actions happened"
    ],
    "answer": "opening container",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "201151_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening container",
      "closing container",
      "neither of the actions happened"
    ],
    "answer": "closing container",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "202222.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing spectacles from left to right",
      "pulling spectacles from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing spectacles from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "202222_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing spectacles from left to right",
      "pulling spectacles from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling spectacles from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "203979.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing steel spoon from right to left",
      "pulling steel spoon from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing steel spoon from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "203979_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing steel spoon from right to left",
      "pulling steel spoon from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling steel spoon from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "20473.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving mat away from the camera",
      "moving mat towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving mat away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "20473_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving mat away from the camera",
      "moving mat towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving mat towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "204993.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling green plastic octagon shaped object from right to left",
      "pushing green plastic octagon shaped object from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling green plastic octagon shaped object from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "204993_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling green plastic octagon shaped object from right to left",
      "pushing green plastic octagon shaped object from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing green plastic octagon shaped object from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "205159.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling calculator from right to left",
      "pushing calculator from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling calculator from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "205159_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling calculator from right to left",
      "pushing calculator from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing calculator from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "205353.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming glasses",
      "turning the camera upwards while filming glasses",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming glasses",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "205353_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming glasses",
      "turning the camera upwards while filming glasses",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming glasses",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "20673.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering pincers with black folder",
      "uncovering pincers",
      "neither of the actions happened"
    ],
    "answer": "covering pincers with black folder",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "20673_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering pincers with black folder",
      "uncovering pincers",
      "neither of the actions happened"
    ],
    "answer": "uncovering pincers",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "207474.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving face creame and glue away from each other",
      "moving face creame and glue closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving face creame and glue away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "207474_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving face creame and glue away from each other",
      "moving face creame and glue closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving face creame and glue closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "207482.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cap bottle away from floor",
      "moving cap bottle closer to floor",
      "neither of the actions happened"
    ],
    "answer": "moving cap bottle away from floor",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "207482_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cap bottle away from floor",
      "moving cap bottle closer to floor",
      "neither of the actions happened"
    ],
    "answer": "moving cap bottle closer to floor",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "207710.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering glass lid",
      "covering glass lid with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering glass lid",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "207710_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering glass lid",
      "covering glass lid with something",
      "neither of the actions happened"
    ],
    "answer": "covering glass lid with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "208520.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering a wallet with a cloth",
      "uncovering a wallet",
      "neither of the actions happened"
    ],
    "answer": "covering a wallet with a cloth",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "208520_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering a wallet with a cloth",
      "uncovering a wallet",
      "neither of the actions happened"
    ],
    "answer": "uncovering a wallet",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "209073.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting froam roller into drawer",
      "taking froam roller out of drawer",
      "neither of the actions happened"
    ],
    "answer": "putting froam roller into drawer",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "209073_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting froam roller into drawer",
      "taking froam roller out of drawer",
      "neither of the actions happened"
    ],
    "answer": "taking froam roller out of drawer",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "20932.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening a carton of tomato sauce",
      "closing a carton of tomato sauce",
      "neither of the actions happened"
    ],
    "answer": "opening a carton of tomato sauce",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "20932_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening a carton of tomato sauce",
      "closing a carton of tomato sauce",
      "neither of the actions happened"
    ],
    "answer": "closing a carton of tomato sauce",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "210056.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a bottle up",
      "moving a bottle down",
      "neither of the actions happened"
    ],
    "answer": "moving a bottle up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "210056_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a bottle up",
      "moving a bottle down",
      "neither of the actions happened"
    ],
    "answer": "moving a bottle down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "21020.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing adapter from left to right",
      "pulling adapter from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing adapter from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "21020_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing adapter from left to right",
      "pulling adapter from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling adapter from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "210542.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing flask",
      "opening flask",
      "neither of the actions happened"
    ],
    "answer": "closing flask",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "210542_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing flask",
      "opening flask",
      "neither of the actions happened"
    ],
    "answer": "opening flask",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "213425.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering crayon with paper",
      "uncovering crayon",
      "neither of the actions happened"
    ],
    "answer": "covering crayon with paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "213425_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering crayon with paper",
      "uncovering crayon",
      "neither of the actions happened"
    ],
    "answer": "uncovering crayon",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "217161.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling an envelope from left to right",
      "pushing an envelope from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling an envelope from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "217161_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling an envelope from left to right",
      "pushing an envelope from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing an envelope from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "217848.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothbrush away from the camera",
      "moving toothbrush towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving toothbrush away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "217848_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothbrush away from the camera",
      "moving toothbrush towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving toothbrush towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "218086.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving ring away from the camera",
      "moving ring towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving ring away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "218086_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving ring away from the camera",
      "moving ring towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving ring towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "218997.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing apple from left to right",
      "pulling apple from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing apple from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "218997_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing apple from left to right",
      "pulling apple from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling apple from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "220413.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving mate away from the camera",
      "moving mate towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving mate away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "220413_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving mate away from the camera",
      "moving mate towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving mate towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "22606.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling bracelet from left to right",
      "pushing bracelet from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling bracelet from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "22606_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling bracelet from left to right",
      "pushing bracelet from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing bracelet from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "22939.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming plastic pacifier",
      "turning the camera right while filming plastic pacifier",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming plastic pacifier",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "22939_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming plastic pacifier",
      "turning the camera right while filming plastic pacifier",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming plastic pacifier",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "23473.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching dreidel with your camera",
      "moving away from dreidel with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching dreidel with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "23473_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching dreidel with your camera",
      "moving away from dreidel with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from dreidel with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "24418.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening magazine",
      "closing magazine",
      "neither of the actions happened"
    ],
    "answer": "opening magazine",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "24418_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening magazine",
      "closing magazine",
      "neither of the actions happened"
    ],
    "answer": "closing magazine",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "25810.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering toy",
      "covering toy with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering toy",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "25810_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering toy",
      "covering toy with something",
      "neither of the actions happened"
    ],
    "answer": "covering toy with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "26558.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling sponge from right to left",
      "pushing sponge from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling sponge from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "26558_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling sponge from right to left",
      "pushing sponge from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing sponge from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "26975.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking a wrench out of a basket",
      "putting a wrench into a basket",
      "neither of the actions happened"
    ],
    "answer": "taking a wrench out of a basket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "26975_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking a wrench out of a basket",
      "putting a wrench into a basket",
      "neither of the actions happened"
    ],
    "answer": "putting a wrench into a basket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "27564.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering color pencils with paper",
      "uncovering color pencils",
      "neither of the actions happened"
    ],
    "answer": "covering color pencils with paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "27564_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering color pencils with paper",
      "uncovering color pencils",
      "neither of the actions happened"
    ],
    "answer": "uncovering color pencils",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "27863.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing mobile from right to left",
      "pulling mobile from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing mobile from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "27863_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing mobile from right to left",
      "pulling mobile from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling mobile from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "2871.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a tin from left to right",
      "pushing a tin from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling a tin from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "2871_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a tin from left to right",
      "pushing a tin from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing a tin from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "28792.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing cloth from right to left",
      "pulling cloth from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing cloth from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "28792_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing cloth from right to left",
      "pulling cloth from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling cloth from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "29039.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a hair clutcher and a ball away from each other",
      "moving a hair clutcher and a ball closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving a hair clutcher and a ball away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "29039_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a hair clutcher and a ball away from each other",
      "moving a hair clutcher and a ball closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving a hair clutcher and a ball closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "301.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling battery from right to left",
      "pushing battery from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling battery from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "301_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling battery from right to left",
      "pushing battery from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing battery from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "30874.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming pendrive",
      "turning the camera upwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "30874_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming pendrive",
      "turning the camera upwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "3093.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing calculator from right to left",
      "pulling calculator from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing calculator from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "3093_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing calculator from right to left",
      "pulling calculator from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling calculator from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "31828.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from a bottle of milk with your camera",
      "approaching a bottle of milk with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from a bottle of milk with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "31828_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from a bottle of milk with your camera",
      "approaching a bottle of milk with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching a bottle of milk with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "32083.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a bracelet and a ball away from each other",
      "moving a bracelet and a ball closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving a bracelet and a ball away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "32083_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a bracelet and a ball away from each other",
      "moving a bracelet and a ball closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving a bracelet and a ball closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "34136.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing color pencils from right to left",
      "pulling color pencils from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing color pencils from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "34136_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing color pencils from right to left",
      "pulling color pencils from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling color pencils from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "35423.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming a scooter",
      "turning the camera upwards while filming a scooter",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming a scooter",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "35423_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming a scooter",
      "turning the camera upwards while filming a scooter",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming a scooter",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "36429.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from keyboard with your camera",
      "approaching keyboard with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from keyboard with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "36429_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from keyboard with your camera",
      "approaching keyboard with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching keyboard with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "36797.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying wire cutter tool in sand",
      "digging wire cutter tool out of sand",
      "neither of the actions happened"
    ],
    "answer": "burying wire cutter tool in sand",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "36797_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying wire cutter tool in sand",
      "digging wire cutter tool out of sand",
      "neither of the actions happened"
    ],
    "answer": "digging wire cutter tool out of sand",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "36846.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming deodorant",
      "turning the camera downwards while filming deodorant",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming deodorant",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "36846_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming deodorant",
      "turning the camera downwards while filming deodorant",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming deodorant",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "3695.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving screw and watch away from each other",
      "moving screw and watch closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving screw and watch away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "3695_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving screw and watch away from each other",
      "moving screw and watch closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving screw and watch closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "38225.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling lip liner from right to left",
      "pushing lip liner from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling lip liner from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "38225_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling lip liner from right to left",
      "pushing lip liner from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing lip liner from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "39965.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying paint bucket in cloth",
      "digging paint bucket out of cloth",
      "neither of the actions happened"
    ],
    "answer": "burying paint bucket in cloth",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "39965_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying paint bucket in cloth",
      "digging paint bucket out of cloth",
      "neither of the actions happened"
    ],
    "answer": "digging paint bucket out of cloth",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "40559.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a stone from right to left",
      "pushing a stone from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling a stone from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "40559_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a stone from right to left",
      "pushing a stone from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing a stone from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "40670.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving rag closer to rag",
      "moving rag away from rag",
      "neither of the actions happened"
    ],
    "answer": "moving rag closer to rag",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "40670_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving rag closer to rag",
      "moving rag away from rag",
      "neither of the actions happened"
    ],
    "answer": "moving rag away from rag",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "40796.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming scissors",
      "turning the camera upwards while filming scissors",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming scissors",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "40796_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming scissors",
      "turning the camera upwards while filming scissors",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming scissors",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "42944.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing jar",
      "opening jar",
      "neither of the actions happened"
    ],
    "answer": "closing jar",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "42944_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing jar",
      "opening jar",
      "neither of the actions happened"
    ],
    "answer": "opening jar",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "43692.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging candies out of blanket",
      "burying candies in blanket",
      "neither of the actions happened"
    ],
    "answer": "digging candies out of blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "43692_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging candies out of blanket",
      "burying candies in blanket",
      "neither of the actions happened"
    ],
    "answer": "burying candies in blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "44197.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching kitchen knife with your camera",
      "moving away from kitchen knife with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching kitchen knife with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "44197_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching kitchen knife with your camera",
      "moving away from kitchen knife with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from kitchen knife with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "44253.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving the letter h and number 1 closer to each other",
      "moving the letter h and number 1 away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving the letter h and number 1 closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "44253_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving the letter h and number 1 closer to each other",
      "moving the letter h and number 1 away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving the letter h and number 1 away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "44393.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming a bowl of noodles",
      "turning the camera right while filming a bowl of noodles",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming a bowl of noodles",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "44393_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera left while filming a bowl of noodles",
      "turning the camera right while filming a bowl of noodles",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming a bowl of noodles",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "45286.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking book out of shelf",
      "putting book into shelf",
      "neither of the actions happened"
    ],
    "answer": "taking book out of shelf",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "45286_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking book out of shelf",
      "putting book into shelf",
      "neither of the actions happened"
    ],
    "answer": "putting book into shelf",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47051.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving an okra and an eggplant away from each other",
      "moving an okra and an eggplant closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving an okra and an eggplant away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47051_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving an okra and an eggplant away from each other",
      "moving an okra and an eggplant closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving an okra and an eggplant closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47562.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering box with paper",
      "uncovering box",
      "neither of the actions happened"
    ],
    "answer": "covering box with paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47562_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering box with paper",
      "uncovering box",
      "neither of the actions happened"
    ],
    "answer": "uncovering box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47674.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a spoon closer to a fork",
      "moving a spoon away from a fork",
      "neither of the actions happened"
    ],
    "answer": "moving a spoon closer to a fork",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47674_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a spoon closer to a fork",
      "moving a spoon away from a fork",
      "neither of the actions happened"
    ],
    "answer": "moving a spoon away from a fork",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47943.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting two spoons into a cup",
      "taking two spoons out of a cup",
      "neither of the actions happened"
    ],
    "answer": "putting two spoons into a cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "47943_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "putting two spoons into a cup",
      "taking two spoons out of a cup",
      "neither of the actions happened"
    ],
    "answer": "taking two spoons out of a cup",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "49181.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving wire towards the camera",
      "moving wire away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving wire towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "49181_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving wire towards the camera",
      "moving wire away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving wire away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "4926.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothpaste and deodorant away from each other",
      "moving toothpaste and deodorant closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving toothpaste and deodorant away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "4926_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving toothpaste and deodorant away from each other",
      "moving toothpaste and deodorant closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving toothpaste and deodorant closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "49654.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving battery cell closer to dress glip",
      "moving battery cell away from dress glip",
      "neither of the actions happened"
    ],
    "answer": "moving battery cell closer to dress glip",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "49654_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving battery cell closer to dress glip",
      "moving battery cell away from dress glip",
      "neither of the actions happened"
    ],
    "answer": "moving battery cell away from dress glip",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "50086.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching cup with your camera",
      "moving away from cup with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching cup with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "50086_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching cup with your camera",
      "moving away from cup with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from cup with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "51434.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling remote from left to right",
      "pushing remote from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling remote from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "51434_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling remote from left to right",
      "pushing remote from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing remote from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "52400.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving pen closer to glass",
      "moving pen away from glass",
      "neither of the actions happened"
    ],
    "answer": "moving pen closer to glass",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "52400_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving pen closer to glass",
      "moving pen away from glass",
      "neither of the actions happened"
    ],
    "answer": "moving pen away from glass",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "53575.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving scissor away from air freshener",
      "moving scissor closer to air freshener",
      "neither of the actions happened"
    ],
    "answer": "moving scissor away from air freshener",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "53575_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving scissor away from air freshener",
      "moving scissor closer to air freshener",
      "neither of the actions happened"
    ],
    "answer": "moving scissor closer to air freshener",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "53937.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a cup down",
      "moving a cup up",
      "neither of the actions happened"
    ],
    "answer": "moving a cup down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "53937_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a cup down",
      "moving a cup up",
      "neither of the actions happened"
    ],
    "answer": "moving a cup up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "54438.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from tape measure with your camera",
      "approaching tape measure with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from tape measure with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "54438_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from tape measure with your camera",
      "approaching tape measure with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching tape measure with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "56588.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing badge from right to left",
      "pulling badge from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing badge from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "56588_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing badge from right to left",
      "pulling badge from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling badge from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "57957.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming pendrive",
      "turning the camera upwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "57957_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming pendrive",
      "turning the camera upwards while filming pendrive",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming pendrive",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "58181.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching dreidel with your camera",
      "moving away from dreidel with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching dreidel with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "58181_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching dreidel with your camera",
      "moving away from dreidel with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from dreidel with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "59369.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a perfume bottle from left to right",
      "pushing a perfume bottle from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling a perfume bottle from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "59369_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling a perfume bottle from left to right",
      "pushing a perfume bottle from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing a perfume bottle from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "59409.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving deodorant up",
      "moving deodorant down",
      "neither of the actions happened"
    ],
    "answer": "moving deodorant up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "59409_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving deodorant up",
      "moving deodorant down",
      "neither of the actions happened"
    ],
    "answer": "moving deodorant down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "59544.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving wooden scale up",
      "moving wooden scale down",
      "neither of the actions happened"
    ],
    "answer": "moving wooden scale up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "59544_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving wooden scale up",
      "moving wooden scale down",
      "neither of the actions happened"
    ],
    "answer": "moving wooden scale down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "60227.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing water tap",
      "opening water tap",
      "neither of the actions happened"
    ],
    "answer": "closing water tap",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "60227_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "closing water tap",
      "opening water tap",
      "neither of the actions happened"
    ],
    "answer": "opening water tap",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "61082.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving flashdisk up",
      "moving flashdisk down",
      "neither of the actions happened"
    ],
    "answer": "moving flashdisk up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "61082_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving flashdisk up",
      "moving flashdisk down",
      "neither of the actions happened"
    ],
    "answer": "moving flashdisk down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "62000.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering coin with remote controller",
      "uncovering coin",
      "neither of the actions happened"
    ],
    "answer": "covering coin with remote controller",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "62000_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering coin with remote controller",
      "uncovering coin",
      "neither of the actions happened"
    ],
    "answer": "uncovering coin",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "6315.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving puff-box down",
      "moving puff-box up",
      "neither of the actions happened"
    ],
    "answer": "moving puff-box down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "6315_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving puff-box down",
      "moving puff-box up",
      "neither of the actions happened"
    ],
    "answer": "moving puff-box up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63190.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving honey away from the camera",
      "moving honey towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving honey away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63190_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving honey away from the camera",
      "moving honey towards the camera",
      "neither of the actions happened"
    ],
    "answer": "moving honey towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63618.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a box of pencil and another box of pencil away from each other",
      "moving a box of pencil and another box of pencil closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving a box of pencil and another box of pencil away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63618_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a box of pencil and another box of pencil away from each other",
      "moving a box of pencil and another box of pencil closer to each other",
      "neither of the actions happened"
    ],
    "answer": "moving a box of pencil and another box of pencil closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63745.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving color pencils closer to color pencils",
      "moving color pencils away from color pencils",
      "neither of the actions happened"
    ],
    "answer": "moving color pencils closer to color pencils",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63745_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving color pencils closer to color pencils",
      "moving color pencils away from color pencils",
      "neither of the actions happened"
    ],
    "answer": "moving color pencils away from color pencils",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63922.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming plastic bowl",
      "turning the camera upwards while filming plastic bowl",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming plastic bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "63922_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming plastic bowl",
      "turning the camera upwards while filming plastic bowl",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming plastic bowl",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "64313.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving purse up",
      "moving purse down",
      "neither of the actions happened"
    ],
    "answer": "moving purse up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "64313_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving purse up",
      "moving purse down",
      "neither of the actions happened"
    ],
    "answer": "moving purse down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "6596.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming webcam",
      "turning the camera downwards while filming webcam",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming webcam",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "6596_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming webcam",
      "turning the camera downwards while filming webcam",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming webcam",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "66104.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing paper from left to right",
      "pulling paper from right to left",
      "neither of the actions happened"
    ],
    "answer": "pushing paper from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "66104_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing paper from left to right",
      "pulling paper from right to left",
      "neither of the actions happened"
    ],
    "answer": "pulling paper from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "66186.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling glass from right to left",
      "pushing glass from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling glass from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "66186_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling glass from right to left",
      "pushing glass from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing glass from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "66359.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering card",
      "covering card with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering card",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "66359_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering card",
      "covering card with something",
      "neither of the actions happened"
    ],
    "answer": "covering card with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "69786.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving flashlight down",
      "moving flashlight up",
      "neither of the actions happened"
    ],
    "answer": "moving flashlight down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "69786_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving flashlight down",
      "moving flashlight up",
      "neither of the actions happened"
    ],
    "answer": "moving flashlight up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "71637.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving sharpener up",
      "moving sharpener down",
      "neither of the actions happened"
    ],
    "answer": "moving sharpener up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "71637_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving sharpener up",
      "moving sharpener down",
      "neither of the actions happened"
    ],
    "answer": "moving sharpener down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "73241.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying plastic container in blanket",
      "digging plastic container out of blanket",
      "neither of the actions happened"
    ],
    "answer": "burying plastic container in blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "73241_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying plastic container in blanket",
      "digging plastic container out of blanket",
      "neither of the actions happened"
    ],
    "answer": "digging plastic container out of blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "73543.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering book with pillow",
      "uncovering book",
      "neither of the actions happened"
    ],
    "answer": "covering book with pillow",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "73543_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering book with pillow",
      "uncovering book",
      "neither of the actions happened"
    ],
    "answer": "uncovering book",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "73798.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from shovel with your camera",
      "approaching shovel with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from shovel with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "73798_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from shovel with your camera",
      "approaching shovel with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching shovel with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "7489.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing mouse from right to left",
      "pulling mouse from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing mouse from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "7489_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing mouse from right to left",
      "pulling mouse from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling mouse from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "75596.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering color pencils with paper",
      "uncovering color pencils",
      "neither of the actions happened"
    ],
    "answer": "covering color pencils with paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "75596_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering color pencils with paper",
      "uncovering color pencils",
      "neither of the actions happened"
    ],
    "answer": "uncovering color pencils",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "75774.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking chilli out of cover",
      "putting chilli into cover",
      "neither of the actions happened"
    ],
    "answer": "taking chilli out of cover",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "75774_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "taking chilli out of cover",
      "putting chilli into cover",
      "neither of the actions happened"
    ],
    "answer": "putting chilli into cover",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "76208.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a cell phone battery towards the camera",
      "moving a cell phone battery away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving a cell phone battery towards the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "76208_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a cell phone battery towards the camera",
      "moving a cell phone battery away from the camera",
      "neither of the actions happened"
    ],
    "answer": "moving a cell phone battery away from the camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "79354.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling finger scanner from right to left",
      "pushing finger scanner from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling finger scanner from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "79354_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pulling finger scanner from right to left",
      "pushing finger scanner from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing finger scanner from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "79847.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding a towel",
      "folding a towel",
      "neither of the actions happened"
    ],
    "answer": "unfolding a towel",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "79847_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "unfolding a towel",
      "folding a towel",
      "neither of the actions happened"
    ],
    "answer": "folding a towel",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "79887.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming oil",
      "turning the camera left while filming oil",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming oil",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "79887_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming oil",
      "turning the camera left while filming oil",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming oil",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "80939.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering color pencils with paper",
      "uncovering color pencils",
      "neither of the actions happened"
    ],
    "answer": "covering color pencils with paper",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "80939_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "covering color pencils with paper",
      "uncovering color pencils",
      "neither of the actions happened"
    ],
    "answer": "uncovering color pencils",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "82632.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving wrapping paper down",
      "moving wrapping paper up",
      "neither of the actions happened"
    ],
    "answer": "moving wrapping paper down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "82632_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving wrapping paper down",
      "moving wrapping paper up",
      "neither of the actions happened"
    ],
    "answer": "moving wrapping paper up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "83016.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cup and cup closer to each other",
      "moving cup and cup away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving cup and cup closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "83016_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving cup and cup closer to each other",
      "moving cup and cup away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving cup and cup away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "85121.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pencil",
      "turning the camera downwards while filming pencil",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming pencil",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "85121_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera upwards while filming pencil",
      "turning the camera downwards while filming pencil",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming pencil",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "86533.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from wash basin with your camera",
      "approaching wash basin with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from wash basin with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "86533_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving away from wash basin with your camera",
      "approaching wash basin with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching wash basin with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "8717.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a razor up",
      "moving a razor down",
      "neither of the actions happened"
    ],
    "answer": "moving a razor up",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "8717_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a razor up",
      "moving a razor down",
      "neither of the actions happened"
    ],
    "answer": "moving a razor down",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "87875.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming small water tank",
      "turning the camera left while filming small water tank",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming small water tank",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "87875_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming small water tank",
      "turning the camera left while filming small water tank",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming small water tank",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "8889.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying bottle in blanket",
      "digging bottle out of blanket",
      "neither of the actions happened"
    ],
    "answer": "burying bottle in blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "8889_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "burying bottle in blanket",
      "digging bottle out of blanket",
      "neither of the actions happened"
    ],
    "answer": "digging bottle out of blanket",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "91386.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming brush",
      "turning the camera upwards while filming brush",
      "neither of the actions happened"
    ],
    "answer": "turning the camera downwards while filming brush",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "91386_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera downwards while filming brush",
      "turning the camera upwards while filming brush",
      "neither of the actions happened"
    ],
    "answer": "turning the camera upwards while filming brush",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "92202.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching bike with your camera",
      "moving away from bike with your camera",
      "neither of the actions happened"
    ],
    "answer": "approaching bike with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "92202_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "approaching bike with your camera",
      "moving away from bike with your camera",
      "neither of the actions happened"
    ],
    "answer": "moving away from bike with your camera",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "93820.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a scatch tape and another scatch tape closer to each other",
      "moving a scatch tape and another scatch tape away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving a scatch tape and another scatch tape closer to each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "93820_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "moving a scatch tape and another scatch tape closer to each other",
      "moving a scatch tape and another scatch tape away from each other",
      "neither of the actions happened"
    ],
    "answer": "moving a scatch tape and another scatch tape away from each other",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "94689.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing bottle from right to left",
      "pulling bottle from left to right",
      "neither of the actions happened"
    ],
    "answer": "pushing bottle from right to left",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "94689_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "pushing bottle from right to left",
      "pulling bottle from left to right",
      "neither of the actions happened"
    ],
    "answer": "pulling bottle from left to right",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "95242.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening a box",
      "closing a box",
      "neither of the actions happened"
    ],
    "answer": "opening a box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "95242_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "opening a box",
      "closing a box",
      "neither of the actions happened"
    ],
    "answer": "closing a box",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "95530.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering sun glass",
      "covering sun glass with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering sun glass",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "95530_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering sun glass",
      "covering sun glass with something",
      "neither of the actions happened"
    ],
    "answer": "covering sun glass with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "95641.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding dosa",
      "unfolding dosa",
      "neither of the actions happened"
    ],
    "answer": "folding dosa",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "95641_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "folding dosa",
      "unfolding dosa",
      "neither of the actions happened"
    ],
    "answer": "unfolding dosa",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "97502.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming shower",
      "turning the camera left while filming shower",
      "neither of the actions happened"
    ],
    "answer": "turning the camera right while filming shower",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "97502_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "turning the camera right while filming shower",
      "turning the camera left while filming shower",
      "neither of the actions happened"
    ],
    "answer": "turning the camera left while filming shower",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "97598.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging spoon out of sand",
      "burying spoon in sand",
      "neither of the actions happened"
    ],
    "answer": "digging spoon out of sand",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "97598_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "digging spoon out of sand",
      "burying spoon in sand",
      "neither of the actions happened"
    ],
    "answer": "burying spoon in sand",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "9908.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering brush",
      "covering brush with something",
      "neither of the actions happened"
    ],
    "answer": "uncovering brush",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  },
  {
    "video": "9908_reversed.mp4",
    "question": "Which of the following actions appeared in the video?",
    "candidates": [
      "uncovering brush",
      "covering brush with something",
      "neither of the actions happened"
    ],
    "answer": "covering brush with something",
    "source_category": "reversible_dynamics",
    "source_subcategory": "SS2"
  }
]