{"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":"1510372","name":"No 1 Mine"},"operator":{"type":"operator","id":"P07921","name":"Janeco Coal Company Inc"},"controller":{"type":"controller","id":"C00743","name":"Brock Ramsey"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00016","name":"Swartwood T Marshall"},"object":{"type":"mine","id":"1510372","name":"No 1 Mine"},"validFrom":"1975-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510372|C00016|1975-06-02|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00045","name":"Coal Fuels Inc"},"object":{"type":"mine","id":"1510372","name":"No 1 Mine"},"validFrom":"1977-04-01","validTo":"1978-02-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510372|P00045|1977-04-01|1978-02-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00016","name":"Swartwood T Marshall"},"object":{"type":"operator","id":"P00045","name":"Coal Fuels Inc"},"validFrom":"1977-04-01","validTo":"1978-02-22","current":false,"derived":true,"evidenceMineId":"1510372","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510372|P00045|1977-04-01|C00016|1975-06-02|43609"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07921","name":"Janeco Coal Company Inc"},"object":{"type":"mine","id":"1510372","name":"No 1 Mine"},"validFrom":"1978-02-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510372|P07921|1978-02-23|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00743","name":"Brock Ramsey"},"object":{"type":"mine","id":"1510372","name":"No 1 Mine"},"validFrom":"1978-02-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510372|C00743|1978-02-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00743","name":"Brock Ramsey"},"object":{"type":"operator","id":"P07921","name":"Janeco Coal Company Inc"},"validFrom":"1978-02-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"1510372","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510372|P07921|1978-02-23|C00743|1978-02-23|49718"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1510372","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"}}