{"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":"4405893","name":"Mine No 2"},"operator":{"type":"operator","id":"P10141","name":"Judy C Coal Company"},"controller":{"type":"controller","id":"C04095","name":"Harman Kendris (Ken)"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01096","name":"James C  Ball"},"object":{"type":"mine","id":"4405893","name":"Mine No 2"},"validFrom":"1975-09-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405893|C01096|1975-09-15|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04095","name":"Harman Kendris (Ken)"},"object":{"type":"mine","id":"4405893","name":"Mine No 2"},"validFrom":"1979-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405893|C04095|1979-08-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01295","name":"Peggy-O Coal Company Inc"},"object":{"type":"mine","id":"4405893","name":"Mine No 2"},"validFrom":"1982-05-01","validTo":"1982-06-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405893|P01295|1982-05-01|1982-06-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01096","name":"James C  Ball"},"object":{"type":"operator","id":"P01295","name":"Peggy-O Coal Company Inc"},"validFrom":"1982-05-01","validTo":"1982-06-16","current":false,"derived":true,"evidenceMineId":"4405893","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405893|P01295|1982-05-01|C01096|1975-09-15|52239"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10141","name":"Judy C Coal Company"},"object":{"type":"mine","id":"4405893","name":"Mine No 2"},"validFrom":"1982-06-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405893|P10141|1982-06-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04095","name":"Harman Kendris (Ken)"},"object":{"type":"operator","id":"P10141","name":"Judy C Coal Company"},"validFrom":"1982-06-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"4405893","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4405893|P10141|1982-06-17|C04095|1979-08-01|64739"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4405893","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"}}