{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-17T05:35:58.500035+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"4000095","name":"Turner Brothers Stone Quarry"},"operator":{"type":"operator","id":"L11232","name":"Turner Brothers Stone of Crossville, Inc"},"controller":{"type":"controller","id":"M08696","name":"Howard L  Mercer"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11231","name":"Turner Brothers Stone Company Inc"},"object":{"type":"mine","id":"4000095","name":"Turner Brothers Stone Quarry"},"validFrom":"1950-01-01","validTo":"1981-03-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4000095|L11231|1950-01-01|1981-03-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08695","name":"Walter A  Turner"},"object":{"type":"mine","id":"4000095","name":"Turner Brothers Stone Quarry"},"validFrom":"1950-01-01","validTo":"1981-03-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4000095|M08695|1950-01-01|1981-03-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08695","name":"Walter A  Turner"},"object":{"type":"operator","id":"L11231","name":"Turner Brothers Stone Company Inc"},"validFrom":"1950-01-01","validTo":"1981-03-25","current":false,"derived":true,"evidenceMineId":"4000095","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4000095|L11231|1950-01-01|M08695|1950-01-01|143931"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11232","name":"Turner Brothers Stone Of Crossville, Inc"},"object":{"type":"mine","id":"4000095","name":"Turner Brothers Stone Quarry"},"validFrom":"1981-03-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4000095|L11232|1981-03-26|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08696","name":"Howard L  Mercer"},"object":{"type":"mine","id":"4000095","name":"Turner Brothers Stone Quarry"},"validFrom":"1981-03-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4000095|M08696|1981-03-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08696","name":"Howard L  Mercer"},"object":{"type":"operator","id":"L11232","name":"Turner Brothers Stone Of Crossville, Inc"},"validFrom":"1981-03-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"4000095","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4000095|L11232|1981-03-26|M08696|1981-03-26|143932"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4000095","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}