{"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":"2026-10-18T09:31:49.615908+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":"2003400","name":"Stone Scrubber (Ann Arbor Sand & Gravel)"},"operator":{"type":"operator","id":"0051329","name":"Gentner Materials"},"controller":{"type":"controller","id":"0041811","name":"Gentner Incorporated"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041811","name":"Gentner Incorporated"},"object":{"type":"mine","id":"2003400","name":"Stone Scrubber (Ann Arbor Sand & Gravel)"},"validFrom":"2003-06-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2003400|0041811|2003-06-16|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051329","name":"Gentner Materials"},"object":{"type":"mine","id":"2003400","name":"Stone Scrubber (Ann Arbor Sand & Gravel)"},"validFrom":"2008-04-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2003400|0051329|2008-04-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041811","name":"Gentner Incorporated"},"object":{"type":"operator","id":"0051329","name":"Gentner Materials"},"validFrom":"2008-04-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"2003400","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2003400|0051329|2008-04-17|0041811|2003-06-16|3109"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2003400","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}