{"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":"1800820","name":"Midland Mine"},"operator":{"type":"operator","id":"0126634","name":"Simkol Corp."},"controller":{"type":"controller","id":"0167925","name":"Spencer J Svonavec"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11416","name":"Donald  Simpson"},"object":{"type":"mine","id":"1800820","name":"Midland Mine"},"validFrom":"2013-01-11","validTo":"2022-03-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800820|C11416|2013-01-11|2022-03-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0167925","name":"Spencer J Svonavec"},"object":{"type":"mine","id":"1800820","name":"Midland Mine"},"validFrom":"2022-03-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800820|0167925|2022-03-29|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0126634","name":"Simkol Corp."},"object":{"type":"mine","id":"1800820","name":"Midland Mine"},"validFrom":"2023-12-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800820|0126634|2023-12-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0167925","name":"Spencer J Svonavec"},"object":{"type":"operator","id":"0126634","name":"Simkol Corp."},"validFrom":"2023-12-04","validTo":null,"current":true,"derived":true,"evidenceMineId":"1800820","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800820|0126634|2023-12-04|0167925|2022-03-29|35408"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11416","name":"Donald  Simpson"},"object":{"type":"operator","id":"0126634","name":"Simkol Corp."},"validFrom":"2023-12-04","validTo":"2022-03-28","current":false,"derived":true,"evidenceMineId":"1800820","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800820|0126634|2023-12-04|C11416|2013-01-11|84542"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1800820","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"}}