{"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":"4404081","name":"No 1 Mine"},"operator":{"type":"operator","id":"P03353","name":"A & A Coal Company Inc"},"controller":{"type":"controller","id":"C01533","name":"Adkins Sherman & Estil"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00217","name":"Epic Coal Company"},"object":{"type":"mine","id":"4404081","name":"No 1 Mine"},"validFrom":"1975-05-16","validTo":"1976-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404081|P00217|1975-05-16|1976-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00164","name":"Boyd David"},"object":{"type":"mine","id":"4404081","name":"No 1 Mine"},"validFrom":"1975-05-16","validTo":"1976-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404081|C00164|1975-05-16|1976-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00164","name":"Boyd David"},"object":{"type":"operator","id":"P00217","name":"Epic Coal Company"},"validFrom":"1975-05-16","validTo":"1976-09-30","current":false,"derived":true,"evidenceMineId":"4404081","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404081|P00217|1975-05-16|C00164|1975-05-16|44605"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03353","name":"A & A Coal Company Inc"},"object":{"type":"mine","id":"4404081","name":"No 1 Mine"},"validFrom":"1976-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404081|P03353|1976-10-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01533","name":"Adkins Sherman & Estil"},"object":{"type":"mine","id":"4404081","name":"No 1 Mine"},"validFrom":"1976-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404081|C01533|1976-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01533","name":"Adkins Sherman & Estil"},"object":{"type":"operator","id":"P03353","name":"A & A Coal Company Inc"},"validFrom":"1976-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4404081","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404081|P03353|1976-10-01|C01533|1976-10-01|54500"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4404081","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"}}