{"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":"4201110","name":"Lakefork Pit"},"operator":{"type":"operator","id":"L04059","name":"Harris Bethers Construction Company"},"controller":{"type":"controller","id":"M03255","name":"Bethers Harris"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01616","name":"Hall Gardner Construction Company"},"object":{"type":"mine","id":"4201110","name":"Lakefork Pit"},"validFrom":"1950-01-01","validTo":"1980-05-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4201110|L01616|1950-01-01|1980-05-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01448","name":"Gardner Hall Construction Company"},"object":{"type":"mine","id":"4201110","name":"Lakefork Pit"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4201110|M01448|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01448","name":"Gardner Hall Construction Company"},"object":{"type":"operator","id":"L01616","name":"Hall Gardner Construction Company"},"validFrom":"1950-01-01","validTo":"1980-05-12","current":false,"derived":true,"evidenceMineId":"4201110","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4201110|L01616|1950-01-01|M01448|1950-01-01|118716"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03255","name":"Bethers Harris"},"object":{"type":"mine","id":"4201110","name":"Lakefork Pit"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4201110|M03255|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04059","name":"Harris Bethers Construction Company"},"object":{"type":"mine","id":"4201110","name":"Lakefork Pit"},"validFrom":"1980-05-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4201110|L04059|1980-05-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03255","name":"Bethers Harris"},"object":{"type":"operator","id":"L04059","name":"Harris Bethers Construction Company"},"validFrom":"1980-05-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"4201110","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4201110|L04059|1980-05-13|M03255|1950-01-01|128617"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4201110","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"}}