{"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":"1508328","name":"No 6 Mine"},"operator":{"type":"operator","id":"P00247","name":"Karst Robbins Coal Company Inc"},"controller":{"type":"controller","id":"C00195","name":"Karst Edward W"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00195","name":"Karst Edward W"},"object":{"type":"mine","id":"1508328","name":"No 6 Mine"},"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":"1508328|C00195|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03169","name":"Yellow Star Darby Coal Company Inc"},"object":{"type":"mine","id":"1508328","name":"No 6 Mine"},"validFrom":"1975-05-05","validTo":"1976-07-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|P03169|1975-05-05|1976-07-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00195","name":"Karst Edward W"},"object":{"type":"mine","id":"1508328","name":"No 6 Mine"},"validFrom":"1975-05-05","validTo":"1976-07-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|C00195|1975-05-05|1976-07-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00195","name":"Karst Edward W"},"object":{"type":"operator","id":"P03169","name":"Yellow Star Darby Coal Company Inc"},"validFrom":"1975-05-05","validTo":"1976-07-28","current":false,"derived":true,"evidenceMineId":"1508328","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|P03169|1975-05-05|C00195|1975-05-05|44809"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03170","name":"Cloverfork Fuel Company"},"object":{"type":"mine","id":"1508328","name":"No 6 Mine"},"validFrom":"1976-07-29","validTo":"1977-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|P03170|1976-07-29|1977-07-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02693","name":"Lunsford Douglas K"},"object":{"type":"mine","id":"1508328","name":"No 6 Mine"},"validFrom":"1976-07-29","validTo":"1977-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|C02693|1976-07-29|1977-07-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02693","name":"Lunsford Douglas K"},"object":{"type":"operator","id":"P03170","name":"Cloverfork Fuel Company"},"validFrom":"1976-07-29","validTo":"1977-07-31","current":false,"derived":true,"evidenceMineId":"1508328","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|P03170|1976-07-29|C02693|1976-07-29|60475"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00247","name":"Karst Robbins Coal Company Inc"},"object":{"type":"mine","id":"1508328","name":"No 6 Mine"},"validFrom":"1977-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|P00247|1977-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00195","name":"Karst Edward W"},"object":{"type":"operator","id":"P00247","name":"Karst Robbins Coal Company Inc"},"validFrom":"1977-08-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1508328","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508328|P00247|1977-08-01|C00195|1950-01-01|44799"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1508328","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"}}