{"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":"1516320","name":"Inferno #6"},"operator":{"type":"operator","id":"P01832","name":"Branham & Baker Coal Company Inc"},"controller":{"type":"controller","id":"C01543","name":"Donn A  Chickering"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01543","name":"Donn A  Chickering"},"object":{"type":"mine","id":"1516320","name":"Inferno #6"},"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":"1516320|C01543|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02966","name":"Richard E  Salyer et al"},"object":{"type":"mine","id":"1516320","name":"Inferno #6"},"validFrom":"1976-11-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516320|C02966|1976-11-23|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03594","name":"Inferno Coals Inc"},"object":{"type":"mine","id":"1516320","name":"Inferno #6"},"validFrom":"1988-03-01","validTo":"1989-01-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516320|P03594|1988-03-01|1989-01-29"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02966","name":"Richard E  Salyer et al"},"object":{"type":"operator","id":"P03594","name":"Inferno Coals Inc"},"validFrom":"1988-03-01","validTo":"1989-01-29","current":false,"derived":true,"evidenceMineId":"1516320","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516320|P03594|1988-03-01|C02966|1976-11-23|61485"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01832","name":"Branham & Baker Coal Company Inc"},"object":{"type":"mine","id":"1516320","name":"Inferno #6"},"validFrom":"1989-01-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516320|P01832|1989-01-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01543","name":"Donn A  Chickering"},"object":{"type":"operator","id":"P01832","name":"Branham & Baker Coal Company Inc"},"validFrom":"1989-01-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"1516320","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516320|P01832|1989-01-30|C01543|1950-01-01|54636"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1516320","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"}}