{
    "action": "final",
    "content": "**No duplicate rows were found in this dataset.**\n\nI checked for exact duplicates across all meaningful columns (excluding metadata fields like `_ingestion_timestamp`, `_batch_id`, `_source_file`, and `_source_system`). The query returned zero rows, confirming that every record in the 144-row dataset is unique.\n\n**What this means:**\n- Each boxing champion entry represents a distinct reign or recognition period\n- No data entry errors created identical records\n- The dataset is clean from a duplication perspective\n\n**Note on near-duplicates:** While there are no exact duplicates, the dataset could still contain near-duplicates where champions have multiple reigns or recognitions that differ only slightly (e.g., same champion, different time periods or recognition bodies). The current check verified exact row-level duplication; identifying near-duplicates would require defining specific similarity criteria (e.g., same champion name with overlapping date ranges)."
}