{"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":"2902173","name":"CRUSHER #1"},"operator":{"type":"operator","id":"L14208","name":"Blair Turner Construction"},"controller":{"type":"controller","id":"M10861","name":"Robert  Blair; Jaqueline  Blair; William B  Turner"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10861","name":"Jaqueline  Blair  et al"},"object":{"type":"mine","id":"2902173","name":"CRUSHER #1"},"validFrom":"1995-02-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902173|M10861|1995-02-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14208","name":"Blair Turner Construction"},"object":{"type":"mine","id":"2902173","name":"CRUSHER #1"},"validFrom":"1998-02-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902173|L14208|1998-02-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10861","name":"Jaqueline  Blair  et al"},"object":{"type":"operator","id":"L14208","name":"Blair Turner Construction"},"validFrom":"1998-02-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2902173","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902173|L14208|1998-02-01|M10861|1995-02-28|150187"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10861","name":"William B  Turner  et al"},"object":{"type":"operator","id":"L14208","name":"Blair Turner Construction"},"validFrom":"1998-02-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2902173","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902173|L14208|1998-02-01|M10861|1995-02-28|150188"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10861","name":"Robert  Blair  et al"},"object":{"type":"operator","id":"L14208","name":"Blair Turner Construction"},"validFrom":"1998-02-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2902173","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2902173|L14208|1998-02-01|M10861|1995-02-28|150189"}}],"coverage":{"historyRecords":3,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2902173","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"}}