{"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":"4405101","name":"R. E. SANSOM MINE & MILL"},"operator":{"type":"operator","id":"L39883","name":"Virginia Vermiculite LLC"},"controller":{"type":"controller","id":"0082513","name":"Ned  Gumble"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L39883","name":"Virginia Vermiculite LLC"},"object":{"type":"mine","id":"4405101","name":"R. E. SANSOM MINE & MILL"},"validFrom":"1978-03-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405101|L39883|1978-03-09|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09011","name":"Robert  Sansom"},"object":{"type":"mine","id":"4405101","name":"R. E. SANSOM MINE & MILL"},"validFrom":"1978-03-09","validTo":"2009-02-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405101|M09011|1978-03-09|2009-02-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09011","name":"Robert  Sansom"},"object":{"type":"operator","id":"L39883","name":"Virginia Vermiculite LLC"},"validFrom":"1978-03-09","validTo":"2009-02-11","current":false,"derived":true,"evidenceMineId":"4405101","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405101|L39883|1978-03-09|M09011|1978-03-09|144894"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0082513","name":"Ned  Gumble et al"},"object":{"type":"mine","id":"4405101","name":"R. E. SANSOM MINE & MILL"},"validFrom":"2009-02-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405101|0082513|2009-02-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0082513","name":"Ned  Gumble et al"},"object":{"type":"operator","id":"L39883","name":"Virginia Vermiculite LLC"},"validFrom":"2009-02-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"4405101","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405101|L39883|1978-03-09|0082513|2009-02-12|13138"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4405101","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"}}