annotations/annotation_00022.json

[
  {
    "label": "frontier",
    "start": [
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    ],
    "end": [
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      308.0
    ]
  },
  {
    "label": "frontier",
    "start": [
      1412.0,
      626.0
    ],
    "end": [
      1502.0,
      650.0
    ]
  }
]