{
  "metainfo": {
    "categories": [
      {
        "category_name": "first",
        "id": 0
      },
      {
        "category_name": "second",
        "id": 1
      }
    ]
  },
  "data_list": [
    {
      "img_path": "a/1.JPG",
      "gt_label": [0]
    },
    {
      "img_path": "b/2.jpeg",
      "gt_label": [1]
    },
    {
      "img_path": "b/subb/2.jpeg",
      "gt_label": [0, 1]
    }
  ]
}
