{"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":"2026-10-17T05:35:58.500035+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":"1518497","name":"Pittsburg Job"},"operator":{"type":"operator","id":"P17683","name":"Elmo Greer & Sons LLC"},"controller":{"type":"controller","id":"C01252","name":"Rex  Greer; Jerry  Greer"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01252","name":"Jerry  Greer et al"},"object":{"type":"mine","id":"1518497","name":"Pittsburg Job"},"validFrom":"1976-06-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518497|C01252|1976-06-10|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17683","name":"Elmo Greer & Sons LLC"},"object":{"type":"mine","id":"1518497","name":"Pittsburg Job"},"validFrom":"2002-01-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518497|P17683|2002-01-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01252","name":"Jerry  Greer et al"},"object":{"type":"operator","id":"P17683","name":"Elmo Greer & Sons LLC"},"validFrom":"2002-01-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"1518497","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518497|P17683|2002-01-02|C01252|1976-06-10|53096"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01252","name":"Rex  Greer et al"},"object":{"type":"operator","id":"P17683","name":"Elmo Greer & Sons LLC"},"validFrom":"2002-01-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"1518497","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1518497|P17683|2002-01-02|C01252|1976-06-10|53097"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1518497","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}