captcha/coordinates/sample_0004/coordinates.json

{
  "image_list": [
    "image_1.png",
    "image_2.png",
    "image_3.png",
    "image_4.png",
    "image_5.png"
  ],
  "ground_truth_image_index": 2,
  "arrow_box": [
    [
      575,
      719,
      635,
      779
    ],
    [
      857,
      699,
      917,
      759
    ]
  ],
  "submit_box": [
    40,
    620,
    375,
    750
  ]
}