{"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":"4604371","name":"No 2 Mine"},"operator":{"type":"operator","id":"P00308","name":"Mountain Resources"},"controller":{"type":"controller","id":"C00247","name":"B & L Oil Co"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00247","name":"B & L Oil Co"},"object":{"type":"mine","id":"4604371","name":"No 2 Mine"},"validFrom":"1974-08-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604371|C00247|1974-08-19|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00309","name":"Brent Coal Company Inc"},"object":{"type":"mine","id":"4604371","name":"No 2 Mine"},"validFrom":"1974-11-15","validTo":"1975-10-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604371|P00309|1974-11-15|1975-10-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00248","name":"Cannon Herbert S & Company Limited"},"object":{"type":"mine","id":"4604371","name":"No 2 Mine"},"validFrom":"1974-11-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604371|C00248|1974-11-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00248","name":"Cannon Herbert S & Company Limited"},"object":{"type":"operator","id":"P00309","name":"Brent Coal Company Inc"},"validFrom":"1974-11-15","validTo":"1975-10-16","current":false,"derived":true,"evidenceMineId":"4604371","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604371|P00309|1974-11-15|C00248|1974-11-15|45464"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00308","name":"Mountain Resources"},"object":{"type":"mine","id":"4604371","name":"No 2 Mine"},"validFrom":"1975-10-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604371|P00308|1975-10-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00247","name":"B & L Oil Co"},"object":{"type":"operator","id":"P00308","name":"Mountain Resources"},"validFrom":"1975-10-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"4604371","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4604371|P00308|1975-10-17|C00247|1974-08-19|45463"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4604371","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"}}