```json { "action": "final", "content": "**No duplicate rows exist in this dataset.**\n\nI checked both tables for exact duplicates by examining their primary keys:\n\n- **raw.adsl**: 0 duplicate keys, 0 duplicate rows\n- **raw.ae**: 0 duplicate keys, 0 duplicate rows\n\nEach table maintains unique records at its grain level:\n- `raw.adsl` has one row per study subject (keyed by USUBJID)\n- `raw.ae` has one row per adverse event occurrence per subject (keyed by USUBJID + AESEQ)\n\nNo near-duplicate analysis is needed since there are no exact duplicates to investigate further. The dataset maintains clean, unique records across both tables." } ```