{"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":"1507192","name":"No 4 Mine"},"operator":{"type":"operator","id":"P08874","name":"D F J Coal Company Inc"},"controller":{"type":"controller","id":"C07033","name":"Linder John"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02260","name":"D J D Coal Company"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1974-01-01","validTo":"1974-08-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P02260|1974-01-01|1974-08-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01931","name":"D J D Coal Company"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1974-01-01","validTo":"1974-08-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|C01931|1974-01-01|1974-08-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01931","name":"D J D Coal Company"},"object":{"type":"operator","id":"P02260","name":"D J D Coal Company"},"validFrom":"1974-01-01","validTo":"1974-08-26","current":false,"derived":true,"evidenceMineId":"1507192","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P02260|1974-01-01|C01931|1974-01-01|56869"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02259","name":"Vance & Couch Coal Company"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1974-08-27","validTo":"1978-10-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P02259|1974-08-27|1978-10-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01930","name":"Couch George"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1974-08-27","validTo":"1978-10-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|C01930|1974-08-27|1978-10-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01930","name":"Couch George"},"object":{"type":"operator","id":"P02259","name":"Vance & Couch Coal Company"},"validFrom":"1974-08-27","validTo":"1978-10-05","current":false,"derived":true,"evidenceMineId":"1507192","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P02259|1974-08-27|C01930|1974-08-27|56868"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07033","name":"Linder John"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1978-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|C07033|1978-09-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P09660","name":"B & B Coal Company"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1978-10-06","validTo":"1979-03-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P09660|1978-10-06|1979-03-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07502","name":"Brown Edward A & Gary Bentley"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1978-10-06","validTo":"1979-03-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|C07502|1978-10-06|1979-03-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07502","name":"Brown Edward A & Gary Bentley"},"object":{"type":"operator","id":"P09660","name":"B & B Coal Company"},"validFrom":"1978-10-06","validTo":"1979-03-08","current":false,"derived":true,"evidenceMineId":"1507192","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P09660|1978-10-06|C07502|1978-10-06|74870"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08874","name":"D F J Coal Company Inc"},"object":{"type":"mine","id":"1507192","name":"No 4 Mine"},"validFrom":"1979-03-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P08874|1979-03-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07033","name":"Linder John"},"object":{"type":"operator","id":"P08874","name":"D F J Coal Company Inc"},"validFrom":"1979-03-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"1507192","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507192|P08874|1979-03-09|C07033|1978-09-01|73561"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1507192","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"}}