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          "why_canonical"
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          "has_source_manifest",
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        "verification_note"
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      "description": "Equation notation and translation ledger.",
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      "exists": true,
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          "record_count",
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          "reviewer_profile",
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          "tasks",
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          "image_tag_count",
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          "issue_pages",
          "long_table_pages",
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          "processed_status",
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    {
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          "records",
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        "verification_required"
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}