{"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":"1800262","name":"No 3 Pit"},"operator":{"type":"operator","id":"P10459","name":"Upperman Coal Company"},"controller":{"type":"controller","id":"C00609","name":"Carl Del Signore Family Trust"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01510","name":"Upperman Coal Company"},"object":{"type":"mine","id":"1800262","name":"No 3 Pit"},"validFrom":"1950-01-01","validTo":"1978-11-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800262|P01510|1950-01-01|1978-11-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01280","name":"Upperman Wilbur"},"object":{"type":"mine","id":"1800262","name":"No 3 Pit"},"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":"1800262|C01280|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01280","name":"Upperman Wilbur"},"object":{"type":"operator","id":"P01510","name":"Upperman Coal Company"},"validFrom":"1950-01-01","validTo":"1978-11-26","current":false,"derived":true,"evidenceMineId":"1800262","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800262|P01510|1950-01-01|C01280|1950-01-01|53252"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10459","name":"Upperman Coal Company"},"object":{"type":"mine","id":"1800262","name":"No 3 Pit"},"validFrom":"1978-11-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800262|P10459|1978-11-27|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00609","name":"Carl Del Signore Family Trust"},"object":{"type":"mine","id":"1800262","name":"No 3 Pit"},"validFrom":"1978-11-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800262|C00609|1978-11-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00609","name":"Carl Del Signore Family Trust"},"object":{"type":"operator","id":"P10459","name":"Upperman Coal Company"},"validFrom":"1978-11-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"1800262","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800262|P10459|1978-11-27|C00609|1978-11-27|48413"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1800262","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"}}