{"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":"3402204","name":"Parker Pit #1"},"operator":{"type":"operator","id":"0170833","name":"Switchback Stone LLC"},"controller":{"type":"controller","id":"0155541","name":"Jimmy R Abernathy; Brett G Abernathy"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0170833","name":"Switchback Stone LLC"},"object":{"type":"mine","id":"3402204","name":"Parker Pit #1"},"validFrom":"2020-05-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402204|0170833|2020-05-13|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0155541","name":"Jimmy R Abernathy et al"},"object":{"type":"mine","id":"3402204","name":"Parker Pit #1"},"validFrom":"2020-05-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402204|0155541|2020-05-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0155541","name":"Jimmy R Abernathy et al"},"object":{"type":"operator","id":"0170833","name":"Switchback Stone LLC"},"validFrom":"2020-05-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"3402204","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402204|0170833|2020-05-13|0155541|2020-05-13|32236"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0155541","name":"Brett G Abernathy et al"},"object":{"type":"operator","id":"0170833","name":"Switchback Stone LLC"},"validFrom":"2020-05-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"3402204","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3402204|0170833|2020-05-13|0155541|2020-05-13|32237"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3402204","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"}}