```json { "table_name": "search_engine_benchmark", "table_type_tags": [ {"tag": "dimension", "confidence": 0.90} ], "primary_type": "dimension", "insufficient_evidence": false, "entity": { "columns": ["id"], "unique_per_row": true }, "time_axis": null, "reasoning": "The entity id has Uniqueness 1.000, making each row unique. The composite (probe_set_version, engine) also uniquely identifies rows — each row describes benchmark results for one search engine tested against one probe set version. created_at is constant across all rows (Top 3 Coverage 100%), making it a batch attribute rather than a time axis. The rows are catalog entries of benchmark results, not events or state transitions: dimension." } ```