{"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":"1401592","name":"Calvert Mine"},"operator":{"type":"operator","id":"0202313","name":"Calvert USA, LLC"},"controller":{"type":"controller","id":"0192280","name":"Gavin  Eales"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14389","name":"Calvert Corp"},"object":{"type":"mine","id":"1401592","name":"Calvert Mine"},"validFrom":"1996-01-01","validTo":"2025-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|L14389|1996-01-01|2025-02-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10989","name":"Bernard  Friedman"},"object":{"type":"mine","id":"1401592","name":"Calvert Mine"},"validFrom":"1996-01-01","validTo":"2017-03-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|M10989|1996-01-01|2017-03-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10989","name":"Bernard  Friedman"},"object":{"type":"operator","id":"L14389","name":"Calvert Corp"},"validFrom":"1996-01-01","validTo":"2017-03-09","current":false,"derived":true,"evidenceMineId":"1401592","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|L14389|1996-01-01|M10989|1996-01-01|150391"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0134801","name":"Jane  Wessner"},"object":{"type":"mine","id":"1401592","name":"Calvert Mine"},"validFrom":"2017-03-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|0134801|2017-03-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0134801","name":"Jane  Wessner"},"object":{"type":"operator","id":"L14389","name":"Calvert Corp"},"validFrom":"2017-03-10","validTo":"2025-02-28","current":false,"derived":true,"evidenceMineId":"1401592","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|L14389|1996-01-01|0134801|2017-03-10|27106"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0202313","name":"Calvert USA, LLC"},"object":{"type":"mine","id":"1401592","name":"Calvert Mine"},"validFrom":"2025-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|0202313|2025-03-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0192280","name":"Gavin  Eales"},"object":{"type":"mine","id":"1401592","name":"Calvert Mine"},"validFrom":"2025-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|0192280|2025-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0192280","name":"Gavin  Eales"},"object":{"type":"operator","id":"0202313","name":"Calvert USA, LLC"},"validFrom":"2025-03-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1401592","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1401592|0202313|2025-03-01|0192280|2025-03-01|40933"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1401592","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"}}