{
  "version": "p06-prepared-evaluation-v1",
  "attribution": "Authored numerical test fixture",
  "license": "Test fixture; no real photograph",
  "source": "unit test",
  "preparation": "directly authored RGB",
  "sourceGroupingReview": "One synthetic group; not independent real data",
  "records": [
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      "sourceGroup": "fixture-a",
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      "width": 2,
      "height": 1,
      "rgb": [
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      ],
      "trimap": [
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}