{"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":"1508373","name":"No 1 Surface"},"operator":{"type":"operator","id":"P05699","name":"Bunn & Sexton Construction Co"},"controller":{"type":"controller","id":"C04749","name":"Bunn Jimmy & Harold Sexton"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02734","name":"Jackson Coal Sales"},"object":{"type":"mine","id":"1508373","name":"No 1 Surface"},"validFrom":"1975-01-01","validTo":"1977-02-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508373|P02734|1975-01-01|1977-02-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02359","name":"Coulter Howard"},"object":{"type":"mine","id":"1508373","name":"No 1 Surface"},"validFrom":"1975-01-01","validTo":"1977-02-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508373|C02359|1975-01-01|1977-02-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02359","name":"Coulter Howard"},"object":{"type":"operator","id":"P02734","name":"Jackson Coal Sales"},"validFrom":"1975-01-01","validTo":"1977-02-15","current":false,"derived":true,"evidenceMineId":"1508373","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508373|P02734|1975-01-01|C02359|1975-01-01|58216"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P05699","name":"Bunn & Sexton Construction Co"},"object":{"type":"mine","id":"1508373","name":"No 1 Surface"},"validFrom":"1977-02-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508373|P05699|1977-02-16|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04749","name":"Bunn Jimmy & Harold Sexton"},"object":{"type":"mine","id":"1508373","name":"No 1 Surface"},"validFrom":"1977-02-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508373|C04749|1977-02-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04749","name":"Bunn Jimmy & Harold Sexton"},"object":{"type":"operator","id":"P05699","name":"Bunn & Sexton Construction Co"},"validFrom":"1977-02-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"1508373","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508373|P05699|1977-02-16|C04749|1977-02-16|66609"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1508373","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"}}