{"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":"3604263","name":"Florence Preparation Plant"},"operator":{"type":"operator","id":"P21686","name":"Florence Mining Company"},"controller":{"type":"controller","id":"C14511","name":"Woods Ralph"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01807","name":"Florence Mining Company"},"object":{"type":"mine","id":"3604263","name":"Florence Preparation Plant"},"validFrom":"1950-01-01","validTo":"1984-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|P01807|1950-01-01|1984-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01333","name":"NACCO Industries Inc"},"object":{"type":"mine","id":"3604263","name":"Florence Preparation Plant"},"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":"3604263|C01333|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01333","name":"NACCO Industries Inc"},"object":{"type":"operator","id":"P01807","name":"Florence Mining Company"},"validFrom":"1950-01-01","validTo":"1984-09-30","current":false,"derived":true,"evidenceMineId":"3604263","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|P01807|1950-01-01|C01333|1950-01-01|53579"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P16119","name":"Florence Mining Company"},"object":{"type":"mine","id":"3604263","name":"Florence Preparation Plant"},"validFrom":"1984-10-01","validTo":"1991-10-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|P16119|1984-10-01|1991-10-29"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01537","name":"Rochester & Pittsburgh Coal Company"},"object":{"type":"mine","id":"3604263","name":"Florence Preparation Plant"},"validFrom":"1984-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|C01537|1984-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01537","name":"Rochester & Pittsburgh Coal Company"},"object":{"type":"operator","id":"P16119","name":"Florence Mining Company"},"validFrom":"1984-10-01","validTo":"1991-10-29","current":false,"derived":true,"evidenceMineId":"3604263","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|P16119|1984-10-01|C01537|1984-10-01|54605"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21686","name":"Florence Mining Company"},"object":{"type":"mine","id":"3604263","name":"Florence Preparation Plant"},"validFrom":"1991-10-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|P21686|1991-10-30|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14511","name":"Woods Ralph"},"object":{"type":"mine","id":"3604263","name":"Florence Preparation Plant"},"validFrom":"1991-10-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|C14511|1991-10-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14511","name":"Woods Ralph"},"object":{"type":"operator","id":"P21686","name":"Florence Mining Company"},"validFrom":"1991-10-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"3604263","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3604263|P21686|1991-10-30|C14511|1991-10-30|93058"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3604263","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"}}