{"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":"4608450","name":"Coalburg No A-5 Mine"},"operator":{"type":"operator","id":"P04262","name":"Leah Coal Company Inc"},"controller":{"type":"controller","id":"C03498","name":"Summers William D"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03498","name":"Summers William D"},"object":{"type":"mine","id":"4608450","name":"Coalburg No A-5 Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608450|C03498|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22915","name":"Nicholas County Resources Inc"},"object":{"type":"mine","id":"4608450","name":"Coalburg No A-5 Mine"},"validFrom":"1994-09-01","validTo":"1995-06-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608450|P22915|1994-09-01|1995-06-06"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08189","name":"Thomas M  Rasnake"},"object":{"type":"mine","id":"4608450","name":"Coalburg No A-5 Mine"},"validFrom":"1994-09-01","validTo":"1995-06-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608450|C08189|1994-09-01|1995-06-06"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08189","name":"Thomas M  Rasnake"},"object":{"type":"operator","id":"P22915","name":"Nicholas County Resources Inc"},"validFrom":"1994-09-01","validTo":"1995-06-06","current":false,"derived":true,"evidenceMineId":"4608450","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608450|P22915|1994-09-01|C08189|1994-09-01|76676"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04262","name":"Leah Coal Company Inc"},"object":{"type":"mine","id":"4608450","name":"Coalburg No A-5 Mine"},"validFrom":"1995-06-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608450|P04262|1995-06-07|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03498","name":"Summers William D"},"object":{"type":"operator","id":"P04262","name":"Leah Coal Company Inc"},"validFrom":"1995-06-07","validTo":null,"current":true,"derived":true,"evidenceMineId":"4608450","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608450|P04262|1995-06-07|C03498|1950-01-01|63107"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4608450","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"}}