{"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":"2026-10-13T11:19:05.459773+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":"1517406","name":"Nortonville No 4"},"operator":{"type":"operator","id":"P21846","name":"Kentucky Southern Coal Corp"},"controller":{"type":"controller","id":"C14596","name":"Elmore Stoney D & Dick L Jackson"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14596","name":"Elmore Stoney D & Dick L Jackson"},"object":{"type":"mine","id":"1517406","name":"Nortonville No 4"},"validFrom":"1992-02-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517406|C14596|1992-02-03|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22443","name":"Smith Brothers Mining"},"object":{"type":"mine","id":"1517406","name":"Nortonville No 4"},"validFrom":"1993-05-01","validTo":"1994-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517406|P22443|1993-05-01|1994-09-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13516","name":"Smith Daniel F"},"object":{"type":"mine","id":"1517406","name":"Nortonville No 4"},"validFrom":"1993-05-01","validTo":"1994-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517406|C13516|1993-05-01|1994-09-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13516","name":"Smith Daniel F"},"object":{"type":"operator","id":"P22443","name":"Smith Brothers Mining"},"validFrom":"1993-05-01","validTo":"1994-09-21","current":false,"derived":true,"evidenceMineId":"1517406","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517406|P22443|1993-05-01|C13516|1993-05-01|90202"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21846","name":"Kentucky Southern Coal Corp"},"object":{"type":"mine","id":"1517406","name":"Nortonville No 4"},"validFrom":"1994-09-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517406|P21846|1994-09-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14596","name":"Elmore Stoney D & Dick L Jackson"},"object":{"type":"operator","id":"P21846","name":"Kentucky Southern Coal Corp"},"validFrom":"1994-09-22","validTo":null,"current":true,"derived":true,"evidenceMineId":"1517406","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517406|P21846|1994-09-22|C14596|1992-02-03|93360"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1517406","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}