{"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":"1401510","name":"Plant #3"},"operator":{"type":"operator","id":"L14124","name":"Hunt Midwest Mining Inc-Div Of Kansas"},"controller":{"type":"controller","id":"M06300","name":"Hunt Midwest Enterprises"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00387","name":"R B  Killough"},"object":{"type":"mine","id":"1401510","name":"Plant #3"},"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":"1401510|M00387|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00466","name":"Killough Quarries Inc"},"object":{"type":"mine","id":"1401510","name":"Plant #3"},"validFrom":"1987-08-01","validTo":"1995-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401510|L00466|1987-08-01|1995-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00387","name":"R B  Killough"},"object":{"type":"operator","id":"L00466","name":"Killough Quarries Inc"},"validFrom":"1987-08-01","validTo":"1995-05-31","current":false,"derived":true,"evidenceMineId":"1401510","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401510|L00466|1987-08-01|M00387|1950-01-01|110526"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14124","name":"Hunt Midwest Mining Inc-Div Of Kansas"},"object":{"type":"mine","id":"1401510","name":"Plant #3"},"validFrom":"1995-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401510|L14124|1995-06-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06300","name":"Hunt Midwest Enterprises"},"object":{"type":"mine","id":"1401510","name":"Plant #3"},"validFrom":"1995-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401510|M06300|1995-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06300","name":"Hunt Midwest Enterprises"},"object":{"type":"operator","id":"L14124","name":"Hunt Midwest Mining Inc-Div Of Kansas"},"validFrom":"1995-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1401510","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401510|L14124|1995-06-01|M06300|1995-06-01|138140"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1401510","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"}}