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v5: Remove 3,246 cross-source text duplicates, accurate 568K count
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v4: Stratified random splits (85/7.5/7.5) by season instead of temporal split
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v3: 99.8% episode IDs via J-Archive, fill 116 incomplete episodes, 3-source reconciliation
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v2: Fix answer/clue orientation, add tournaments/special events, add notes field
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Fix source_conflicts serialization and update dataset card with full metadata
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Initial upload: 558,888 Jeopardy clues with enrichment (seasons 1-41)