{"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":"1502406","name":"No 5-C Mine"},"operator":{"type":"operator","id":"P01471","name":"Webb Brothers Coal Company"},"controller":{"type":"controller","id":"C01220","name":"Webb Elmer"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01220","name":"Webb Elmer"},"object":{"type":"mine","id":"1502406","name":"No 5-C Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502406|C01220|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01472","name":"Miller & Murphy Coal Company"},"object":{"type":"mine","id":"1502406","name":"No 5-C Mine"},"validFrom":"1950-01-01","validTo":"1973-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502406|P01472|1950-01-01|1973-07-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01249","name":"Miller & Murphy Coal Company"},"object":{"type":"mine","id":"1502406","name":"No 5-C Mine"},"validFrom":"1950-01-01","validTo":"1973-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502406|C01249|1950-01-01|1973-07-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01249","name":"Miller & Murphy Coal Company"},"object":{"type":"operator","id":"P01472","name":"Miller & Murphy Coal Company"},"validFrom":"1950-01-01","validTo":"1973-07-31","current":false,"derived":true,"evidenceMineId":"1502406","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502406|P01472|1950-01-01|C01249|1950-01-01|53058"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01471","name":"Webb Brothers Coal Company"},"object":{"type":"mine","id":"1502406","name":"No 5-C Mine"},"validFrom":"1973-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502406|P01471|1973-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01220","name":"Webb Elmer"},"object":{"type":"operator","id":"P01471","name":"Webb Brothers Coal Company"},"validFrom":"1973-08-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1502406","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502406|P01471|1973-08-01|C01220|1950-01-01|52914"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1502406","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"}}