{"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":"1515285","name":"No 1"},"operator":{"type":"operator","id":"P17515","name":"Four Way Coal Company Inc"},"controller":{"type":"controller","id":"C11099","name":"Les  Mayhorn; Kennith  Layne"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17008","name":"J E & K Enterprises"},"object":{"type":"mine","id":"1515285","name":"No 1"},"validFrom":"1985-07-01","validTo":"1986-02-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515285|P17008|1985-07-01|1986-02-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11740","name":"Daugherty Ervin"},"object":{"type":"mine","id":"1515285","name":"No 1"},"validFrom":"1985-07-01","validTo":"1986-02-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515285|C11740|1985-07-01|1986-02-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11740","name":"Daugherty Ervin"},"object":{"type":"operator","id":"P17008","name":"J E & K Enterprises"},"validFrom":"1985-07-01","validTo":"1986-02-17","current":false,"derived":true,"evidenceMineId":"1515285","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515285|P17008|1985-07-01|C11740|1985-07-01|85339"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17515","name":"Four Way Coal Company Inc"},"object":{"type":"mine","id":"1515285","name":"No 1"},"validFrom":"1986-02-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515285|P17515|1986-02-18|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11099","name":"Les  Mayhorn et al"},"object":{"type":"mine","id":"1515285","name":"No 1"},"validFrom":"1986-02-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515285|C11099|1986-02-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11099","name":"Les  Mayhorn et al"},"object":{"type":"operator","id":"P17515","name":"Four Way Coal Company Inc"},"validFrom":"1986-02-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"1515285","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515285|P17515|1986-02-18|C11099|1986-02-18|83611"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11099","name":"Kennith  Layne et al"},"object":{"type":"operator","id":"P17515","name":"Four Way Coal Company Inc"},"validFrom":"1986-02-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"1515285","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1515285|P17515|1986-02-18|C11099|1986-02-18|83612"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1515285","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"}}