{"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":"3607339","name":"Alderney Breaker"},"operator":{"type":"operator","id":"P17148","name":"Alderney Coal Company Inc"},"controller":{"type":"controller","id":"C12094","name":"Durkin Edward E"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05538","name":"Mullin Joseph"},"object":{"type":"mine","id":"3607339","name":"Alderney Breaker"},"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":"3607339|C05538|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06669","name":"Shamrock Coal Company Inc"},"object":{"type":"mine","id":"3607339","name":"Alderney Breaker"},"validFrom":"1982-07-01","validTo":"1985-08-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607339|P06669|1982-07-01|1985-08-07"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05538","name":"Mullin Joseph"},"object":{"type":"operator","id":"P06669","name":"Shamrock Coal Company Inc"},"validFrom":"1982-07-01","validTo":"1985-08-07","current":false,"derived":true,"evidenceMineId":"3607339","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607339|P06669|1982-07-01|C05538|1950-01-01|69059"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17148","name":"Alderney Coal Company Inc"},"object":{"type":"mine","id":"3607339","name":"Alderney Breaker"},"validFrom":"1985-08-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607339|P17148|1985-08-08|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12094","name":"Durkin Edward E"},"object":{"type":"mine","id":"3607339","name":"Alderney Breaker"},"validFrom":"1985-08-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607339|C12094|1985-08-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12094","name":"Durkin Edward E"},"object":{"type":"operator","id":"P17148","name":"Alderney Coal Company Inc"},"validFrom":"1985-08-08","validTo":null,"current":true,"derived":true,"evidenceMineId":"3607339","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607339|P17148|1985-08-08|C12094|1985-08-08|86119"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3607339","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"}}