{"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":"2026-10-18T09:31:49.615908+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":"1517060","name":"Zemerex Coal Preparation Plant No1"},"operator":{"type":"operator","id":"P22594","name":"Zemerex Corp"},"controller":{"type":"controller","id":"C14968","name":"Adkins Clarence Edward"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21385","name":"Northwestern Mining & Processing Company Inc"},"object":{"type":"mine","id":"1517060","name":"Zemerex Coal Preparation Plant No1"},"validFrom":"1991-04-01","validTo":"1993-08-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1517060|P21385|1991-04-01|1993-08-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14358","name":"Mare Creek Coal Inc"},"object":{"type":"mine","id":"1517060","name":"Zemerex Coal Preparation Plant No1"},"validFrom":"1991-04-01","validTo":"1993-08-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1517060|C14358|1991-04-01|1993-08-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14358","name":"Mare Creek Coal Inc"},"object":{"type":"operator","id":"P21385","name":"Northwestern Mining & Processing Company Inc"},"validFrom":"1991-04-01","validTo":"1993-08-01","current":false,"derived":true,"evidenceMineId":"1517060","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1517060|P21385|1991-04-01|C14358|1991-04-01|92622"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22594","name":"Zemerex Corp"},"object":{"type":"mine","id":"1517060","name":"Zemerex Coal Preparation Plant No1"},"validFrom":"1993-08-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1517060|P22594|1993-08-02|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14968","name":"Adkins Clarence Edward"},"object":{"type":"mine","id":"1517060","name":"Zemerex Coal Preparation Plant No1"},"validFrom":"1993-08-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1517060|C14968|1993-08-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14968","name":"Adkins Clarence Edward"},"object":{"type":"operator","id":"P22594","name":"Zemerex Corp"},"validFrom":"1993-08-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"1517060","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1517060|P22594|1993-08-02|C14968|1993-08-02|94384"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1517060","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}