{"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":"4104991","name":"Massengale Quarry"},"operator":{"type":"operator","id":"0146494","name":"Johnny's Dozer Service, LLC"},"controller":{"type":"controller","id":"0127641","name":"Johnny J  Massengale"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07263","name":"John R  Thompson"},"object":{"type":"mine","id":"4104991","name":"Massengale Quarry"},"validFrom":"1980-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104991|M07263|1980-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09228","name":"J.R. THOMPSON, INC."},"object":{"type":"mine","id":"4104991","name":"Massengale Quarry"},"validFrom":"2012-12-19","validTo":"2016-06-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104991|L09228|2012-12-19|2016-06-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07263","name":"John R  Thompson"},"object":{"type":"operator","id":"L09228","name":"J.R. THOMPSON, INC."},"validFrom":"2012-12-19","validTo":"2016-06-19","current":false,"derived":true,"evidenceMineId":"4104991","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104991|L09228|2012-12-19|M07263|1980-01-01|140498"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0146494","name":"Johnny's Dozer Service, LLC"},"object":{"type":"mine","id":"4104991","name":"Massengale Quarry"},"validFrom":"2016-06-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104991|0146494|2016-06-20|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127641","name":"Johnny J  Massengale"},"object":{"type":"mine","id":"4104991","name":"Massengale Quarry"},"validFrom":"2016-06-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104991|0127641|2016-06-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127641","name":"Johnny J  Massengale"},"object":{"type":"operator","id":"0146494","name":"Johnny's Dozer Service, LLC"},"validFrom":"2016-06-20","validTo":null,"current":true,"derived":true,"evidenceMineId":"4104991","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104991|0146494|2016-06-20|0127641|2016-06-20|25026"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4104991","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"}}