{"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":"2103320","name":"Biwabik Pit"},"operator":{"type":"operator","id":"0119434","name":"Paul Jacobsen"},"controller":{"type":"controller","id":"0101477","name":"Paul M  Jacobsen"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0050380","name":"KEN JACOBSEN"},"object":{"type":"mine","id":"2103320","name":"Biwabik Pit"},"validFrom":"2002-05-28","validTo":"2011-09-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103320|0050380|2002-05-28|2011-09-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0040766","name":"Ken  Jacobsen"},"object":{"type":"mine","id":"2103320","name":"Biwabik Pit"},"validFrom":"2002-05-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103320|0040766|2002-05-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0040766","name":"Ken  Jacobsen"},"object":{"type":"operator","id":"0050380","name":"KEN JACOBSEN"},"validFrom":"2002-05-28","validTo":"2011-09-11","current":false,"derived":true,"evidenceMineId":"2103320","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103320|0050380|2002-05-28|0040766|2002-05-28|614"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0119434","name":"Paul Jacobsen"},"object":{"type":"mine","id":"2103320","name":"Biwabik Pit"},"validFrom":"2011-09-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103320|0119434|2011-09-12|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0101477","name":"Paul M  Jacobsen"},"object":{"type":"mine","id":"2103320","name":"Biwabik Pit"},"validFrom":"2011-09-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103320|0101477|2011-09-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0101477","name":"Paul M  Jacobsen"},"object":{"type":"operator","id":"0119434","name":"Paul Jacobsen"},"validFrom":"2011-09-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"2103320","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103320|0119434|2011-09-12|0101477|2011-09-12|17244"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2103320","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"}}