{"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":"2026-10-17T05:35:58.500035+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":"2902258","name":"Drennan & Son Sand & Gravel"},"operator":{"type":"operator","id":"0051852","name":"Drennan & Son"},"controller":{"type":"controller","id":"0042533","name":"Charles D  Drennan; David R  Drennan"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051852","name":"Drennan & Son"},"object":{"type":"mine","id":"2902258","name":"Drennan & Son Sand & Gravel"},"validFrom":"2003-10-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902258|0051852|2003-10-08|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042533","name":"Charles D  Drennan  et al"},"object":{"type":"mine","id":"2902258","name":"Drennan & Son Sand & Gravel"},"validFrom":"2003-10-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902258|0042533|2003-10-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042533","name":"Charles D  Drennan  et al"},"object":{"type":"operator","id":"0051852","name":"Drennan & Son"},"validFrom":"2003-10-08","validTo":null,"current":true,"derived":true,"evidenceMineId":"2902258","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902258|0051852|2003-10-08|0042533|2003-10-08|4025"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042533","name":"David R  Drennan  et al"},"object":{"type":"operator","id":"0051852","name":"Drennan & Son"},"validFrom":"2003-10-08","validTo":null,"current":true,"derived":true,"evidenceMineId":"2902258","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902258|0051852|2003-10-08|0042533|2003-10-08|4026"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2902258","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}