{"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":"3602693","name":"Pembroke #1 Mine"},"operator":{"type":"operator","id":"P07499","name":"Pembroke Coal Company"},"controller":{"type":"controller","id":"C06155","name":"Crown Coal & Coke Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02777","name":"Decker Construction Company"},"object":{"type":"mine","id":"3602693","name":"Pembroke #1 Mine"},"validFrom":"1950-01-01","validTo":"1977-09-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3602693|P02777|1950-01-01|1977-09-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02387","name":"Decker Robert W"},"object":{"type":"mine","id":"3602693","name":"Pembroke #1 Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3602693|C02387|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02387","name":"Decker Robert W"},"object":{"type":"operator","id":"P02777","name":"Decker Construction Company"},"validFrom":"1950-01-01","validTo":"1977-09-18","current":false,"derived":true,"evidenceMineId":"3602693","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3602693|P02777|1950-01-01|C02387|1950-01-01|58306"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07499","name":"Pembroke Coal Company"},"object":{"type":"mine","id":"3602693","name":"Pembroke #1 Mine"},"validFrom":"1977-09-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3602693|P07499|1977-09-19|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06155","name":"Crown Coal & Coke Company"},"object":{"type":"mine","id":"3602693","name":"Pembroke #1 Mine"},"validFrom":"1977-09-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3602693|C06155|1977-09-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06155","name":"Crown Coal & Coke Company"},"object":{"type":"operator","id":"P07499","name":"Pembroke Coal Company"},"validFrom":"1977-09-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"3602693","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3602693|P07499|1977-09-19|C06155|1977-09-19|71040"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3602693","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"}}