{
  "good": [
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    21838,
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    22299,
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  ],
  "needs_revision": {
    "21486": "Garbled solution: pie chart reasoning contains rough-work notes (e.g. 'giving 86 - 3 = 83; the worked key gives a total of 80 students') that were not converted to proper explanatory text. Solution needs rewriting with clear step-by-step logic referencing the pie chart sectors."
  }
}