{
  "classifications": [
    {
      "label": "geometric shapes"
    }
  ],
  "objects": [
    {
      "key": "rectangle-1",
      "label": "red rectangle",
      "box": [
        60,
        90,
        240,
        290
      ],
      "polygon": [
        [
          60,
          90
        ],
        [
          240,
          90
        ],
        [
          240,
          290
        ],
        [
          60,
          290
        ]
      ]
    },
    {
      "key": "triangle-1",
      "label": "blue triangle",
      "polygon": [
        [
          340,
          290
        ],
        [
          440,
          70
        ],
        [
          550,
          290
        ]
      ]
    }
  ]
}