{"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":"4406251","name":"No 1 Mine"},"operator":{"type":"operator","id":"P19234","name":"J S H Coal Company Inc"},"controller":{"type":"controller","id":"C00710","name":"Hobbs Danny R"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03007","name":"Billy Ray  Dotson"},"object":{"type":"mine","id":"4406251","name":"No 1 Mine"},"validFrom":"1985-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406251|C03007|1985-07-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17121","name":"Brian Coal Company Inc"},"object":{"type":"mine","id":"4406251","name":"No 1 Mine"},"validFrom":"1985-09-01","validTo":"1987-12-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406251|P17121|1985-09-01|1987-12-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03007","name":"Billy Ray  Dotson"},"object":{"type":"operator","id":"P17121","name":"Brian Coal Company Inc"},"validFrom":"1985-09-01","validTo":"1987-12-03","current":false,"derived":true,"evidenceMineId":"4406251","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406251|P17121|1985-09-01|C03007|1985-07-01|61608"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19234","name":"J S H Coal Company Inc"},"object":{"type":"mine","id":"4406251","name":"No 1 Mine"},"validFrom":"1987-12-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406251|P19234|1987-12-04|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00710","name":"Hobbs Danny R"},"object":{"type":"mine","id":"4406251","name":"No 1 Mine"},"validFrom":"1987-12-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406251|C00710|1987-12-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00710","name":"Hobbs Danny R"},"object":{"type":"operator","id":"P19234","name":"J S H Coal Company Inc"},"validFrom":"1987-12-04","validTo":null,"current":true,"derived":true,"evidenceMineId":"4406251","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406251|P19234|1987-12-04|C00710|1987-12-04|49539"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4406251","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"}}