{
  "schema_version": "1.0",
  "media_id": "synthetic-demo-image-001",
  "media_type": "image",
  "language": "en",
  "audience": "screen-reader user",
  "observations": [
    {
      "observation_id": "obs-dog",
      "text": "A brown dog rests on a blue blanket.",
      "confidence": 0.96,
      "evidence": [
        {
          "evidence_id": "ev-dog-region",
          "kind": "image_region",
          "source_ref": "synthetic-frame-0",
          "confidence": 0.96,
          "region": {
            "x_min": 0.12,
            "y_min": 0.22,
            "x_max": 0.78,
            "y_max": 0.83
          }
        }
      ]
    },
    {
      "observation_id": "obs-ball",
      "text": "A red ball lies beside the dog.",
      "confidence": 0.91,
      "evidence": [
        {
          "evidence_id": "ev-ball-region",
          "kind": "image_region",
          "source_ref": "synthetic-frame-0",
          "confidence": 0.91,
          "region": {
            "x_min": 0.72,
            "y_min": 0.63,
            "x_max": 0.89,
            "y_max": 0.84
          }
        }
      ]
    }
  ]
}