{"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":"1511645","name":"No 1 Mine"},"operator":{"type":"operator","id":"P15273","name":"Kimper Elkhorn Coal Company"},"controller":{"type":"controller","id":"C11001","name":"Meade David"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02432","name":"Mc Guire John H"},"object":{"type":"mine","id":"1511645","name":"No 1 Mine"},"validFrom":"1974-04-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511645|C02432|1974-04-30|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02836","name":"Little Bill Coal Company Inc"},"object":{"type":"mine","id":"1511645","name":"No 1 Mine"},"validFrom":"1978-10-01","validTo":"1984-03-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511645|P02836|1978-10-01|1984-03-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02432","name":"Mc Guire John H"},"object":{"type":"operator","id":"P02836","name":"Little Bill Coal Company Inc"},"validFrom":"1978-10-01","validTo":"1984-03-20","current":false,"derived":true,"evidenceMineId":"1511645","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511645|P02836|1978-10-01|C02432|1974-04-30|58440"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P15273","name":"Kimper Elkhorn Coal Company"},"object":{"type":"mine","id":"1511645","name":"No 1 Mine"},"validFrom":"1984-03-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511645|P15273|1984-03-21|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11001","name":"Meade David Et Al"},"object":{"type":"mine","id":"1511645","name":"No 1 Mine"},"validFrom":"1984-03-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511645|C11001|1984-03-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11001","name":"Meade David Et Al"},"object":{"type":"operator","id":"P15273","name":"Kimper Elkhorn Coal Company"},"validFrom":"1984-03-21","validTo":null,"current":true,"derived":true,"evidenceMineId":"1511645","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511645|P15273|1984-03-21|C11001|1984-03-21|83372"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1511645","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"}}