{
  "clip_id": "0030",
  "source_episode": "episode_025",
  "source_camera": "exterior2",
  "source_video": "/mnt/pfs/share/shentingrui/dataset/droid-100/episode_025/exterior2.mp4",
  "start_time_s": 0.0,
  "end_time_s": 9.0,
  "start_frame": 0,
  "end_frame_exclusive": 135,
  "duration_s": 9.0,
  "object_name": "purple block",
  "action_label": "pick_and_place",
  "description": "The robot arm lowers from an elevated position to approach a purple cube on the table. It grasps the cube, lifts it up, moves it to the right towards a stack of green and orange blocks, and places the purple cube on top of the stack.",
  "evidence": "The gripper is visible throughout the clip. The robot manipulates only the purple cube, lifting it from the table surface and placing it on the existing tower of blocks. The motion is continuous and successful.",
  "quality": {
    "gripper_visible_start": true,
    "gripper_visible_end": true,
    "motion_smooth": true,
    "single_object_only": true,
    "object_clear": true,
    "meaningful_successful_action": true
  },
  "vlm": {
    "provider": "qwen",
    "verification_confidence": 0.95
  }
}