{"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":"1517548","name":"Mine No 2"},"operator":{"type":"operator","id":"P18012","name":"Givens Coal Company Inc"},"controller":{"type":"controller","id":"C03411","name":"George W  Givens Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03411","name":"George W  Givens Jr"},"object":{"type":"mine","id":"1517548","name":"Mine No 2"},"validFrom":"1973-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517548|C03411|1973-04-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02474","name":"Barnwell Darrell G"},"object":{"type":"mine","id":"1517548","name":"Mine No 2"},"validFrom":"1989-05-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517548|C02474|1989-05-30|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22361","name":"Alpha Mining Company"},"object":{"type":"mine","id":"1517548","name":"Mine No 2"},"validFrom":"1994-05-01","validTo":"1995-05-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517548|P22361|1994-05-01|1995-05-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02474","name":"Barnwell Darrell G"},"object":{"type":"operator","id":"P22361","name":"Alpha Mining Company"},"validFrom":"1994-05-01","validTo":"1995-05-08","current":false,"derived":true,"evidenceMineId":"1517548","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517548|P22361|1994-05-01|C02474|1989-05-30|58605"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18012","name":"Givens Coal Company Inc"},"object":{"type":"mine","id":"1517548","name":"Mine No 2"},"validFrom":"1995-05-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517548|P18012|1995-05-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03411","name":"George W  Givens Jr"},"object":{"type":"operator","id":"P18012","name":"Givens Coal Company Inc"},"validFrom":"1995-05-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"1517548","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517548|P18012|1995-05-09|C03411|1973-04-01|62801"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1517548","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"}}