{"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":"4405758","name":"No 1 Mine"},"operator":{"type":"operator","id":"P14996","name":"Plowboy Coal Company Inc"},"controller":{"type":"controller","id":"C05819","name":"Wesley D.  Burke"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P12506","name":"Southland Coal Corp"},"object":{"type":"mine","id":"4405758","name":"No 1 Mine"},"validFrom":"1981-09-01","validTo":"1983-05-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405758|P12506|1981-09-01|1983-05-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07429","name":"Roberts Thomas W Et Al"},"object":{"type":"mine","id":"4405758","name":"No 1 Mine"},"validFrom":"1981-09-01","validTo":"1983-05-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405758|C07429|1981-09-01|1983-05-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07429","name":"Roberts Thomas W Et Al"},"object":{"type":"operator","id":"P12506","name":"Southland Coal Corp"},"validFrom":"1981-09-01","validTo":"1983-05-15","current":false,"derived":true,"evidenceMineId":"4405758","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405758|P12506|1981-09-01|C07429|1981-09-01|74562"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P14996","name":"Plowboy Coal Company Inc"},"object":{"type":"mine","id":"4405758","name":"No 1 Mine"},"validFrom":"1983-05-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405758|P14996|1983-05-16|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05819","name":"Wesley D.  Burke et al"},"object":{"type":"mine","id":"4405758","name":"No 1 Mine"},"validFrom":"1983-05-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405758|C05819|1983-05-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05819","name":"Wesley D.  Burke et al"},"object":{"type":"operator","id":"P14996","name":"Plowboy Coal Company Inc"},"validFrom":"1983-05-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"4405758","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405758|P14996|1983-05-16|C05819|1983-05-16|69947"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4405758","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"}}