{"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":"3001710","name":"Big John Mine"},"operator":{"type":"operator","id":"L07170","name":"Empire Emery Mining Corp"},"controller":{"type":"controller","id":"M05712","name":"Leardi John"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04047","name":"Ernest Bates"},"object":{"type":"mine","id":"3001710","name":"Big John Mine"},"validFrom":"1950-01-01","validTo":"1979-08-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|L04047|1950-01-01|1979-08-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03247","name":"Bates Ernest"},"object":{"type":"mine","id":"3001710","name":"Big John Mine"},"validFrom":"1950-01-01","validTo":"1979-08-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|M03247|1950-01-01|1979-08-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03247","name":"Bates Ernest"},"object":{"type":"operator","id":"L04047","name":"Ernest Bates"},"validFrom":"1950-01-01","validTo":"1979-08-27","current":false,"derived":true,"evidenceMineId":"3001710","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|L04047|1950-01-01|M03247|1950-01-01|128569"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03248","name":"Gillan Frederick D"},"object":{"type":"mine","id":"3001710","name":"Big John Mine"},"validFrom":"1950-01-01","validTo":"1989-01-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|M03248|1950-01-01|1989-01-30"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04048","name":"Emeri-Crete Inc"},"object":{"type":"mine","id":"3001710","name":"Big John Mine"},"validFrom":"1979-08-28","validTo":"1984-04-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|L04048|1979-08-28|1984-04-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03248","name":"Gillan Frederick D"},"object":{"type":"operator","id":"L04048","name":"Emeri-Crete Inc"},"validFrom":"1979-08-28","validTo":"1984-04-01","current":false,"derived":true,"evidenceMineId":"3001710","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|L04048|1979-08-28|M03248|1950-01-01|128571"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07170","name":"Empire Emery Mining Corp"},"object":{"type":"mine","id":"3001710","name":"Big John Mine"},"validFrom":"1984-04-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|L07170|1984-04-02|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05712","name":"Leardi John"},"object":{"type":"mine","id":"3001710","name":"Big John Mine"},"validFrom":"1984-04-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|M05712|1984-04-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05712","name":"Leardi John"},"object":{"type":"operator","id":"L07170","name":"Empire Emery Mining Corp"},"validFrom":"1984-04-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"3001710","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001710|L07170|1984-04-02|M05712|1984-04-02|135198"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3001710","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"}}