{"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":"4601457","name":"Christopher No 5 Mine"},"operator":{"type":"operator","id":"P01751","name":"Pittswick Coal Company Inc"},"controller":{"type":"controller","id":"C01242","name":"Bortz George H Iii"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01753","name":"National Coals Inc"},"object":{"type":"mine","id":"4601457","name":"Christopher No 5 Mine"},"validFrom":"1950-01-01","validTo":"1973-11-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601457|P01753|1950-01-01|1973-11-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01483","name":"National Coals Inc"},"object":{"type":"mine","id":"4601457","name":"Christopher No 5 Mine"},"validFrom":"1950-01-01","validTo":"1973-11-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601457|C01483|1950-01-01|1973-11-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01483","name":"National Coals Inc"},"object":{"type":"operator","id":"P01753","name":"National Coals Inc"},"validFrom":"1950-01-01","validTo":"1973-11-10","current":false,"derived":true,"evidenceMineId":"4601457","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601457|P01753|1950-01-01|C01483|1950-01-01|54291"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01751","name":"Pittswick Coal Company Inc"},"object":{"type":"mine","id":"4601457","name":"Christopher No 5 Mine"},"validFrom":"1973-11-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601457|P01751|1973-11-11|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01242","name":"Bortz George H Iii"},"object":{"type":"mine","id":"4601457","name":"Christopher No 5 Mine"},"validFrom":"1973-11-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601457|C01242|1973-11-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01242","name":"Bortz George H Iii"},"object":{"type":"operator","id":"P01751","name":"Pittswick Coal Company Inc"},"validFrom":"1973-11-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"4601457","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601457|P01751|1973-11-11|C01242|1973-11-11|53024"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4601457","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"}}