{"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":"2200690","name":"Red Hills Mine"},"operator":{"type":"operator","id":"P24525","name":"Mississippi Lignite Mining Company"},"controller":{"type":"controller","id":"C01333","name":"NACCO Industries Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23800","name":"Mississippi Lignite Mining Company"},"object":{"type":"mine","id":"2200690","name":"Red Hills Mine"},"validFrom":"1997-08-01","validTo":"2000-10-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200690|P23800|1997-08-01|2000-10-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13791","name":"North American Coal Corp et al"},"object":{"type":"mine","id":"2200690","name":"Red Hills Mine"},"validFrom":"1997-08-01","validTo":"2000-10-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200690|C13791|1997-08-01|2000-10-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13791","name":"North American Coal Corp et al"},"object":{"type":"operator","id":"P23800","name":"Mississippi Lignite Mining Company"},"validFrom":"1997-08-01","validTo":"2000-10-10","current":false,"derived":true,"evidenceMineId":"2200690","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200690|P23800|1997-08-01|C13791|1997-08-01|91113"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24525","name":"Mississippi Lignite Mining Company"},"object":{"type":"mine","id":"2200690","name":"Red Hills Mine"},"validFrom":"2000-10-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200690|P24525|2000-10-11|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01333","name":"NACCO Industries Inc"},"object":{"type":"mine","id":"2200690","name":"Red Hills Mine"},"validFrom":"2000-10-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200690|C01333|2000-10-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01333","name":"NACCO Industries Inc"},"object":{"type":"operator","id":"P24525","name":"Mississippi Lignite Mining Company"},"validFrom":"2000-10-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"2200690","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200690|P24525|2000-10-11|C01333|2000-10-11|53590"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2200690","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"}}