{"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":"4606400","name":"Amigo #4"},"operator":{"type":"operator","id":"P18757","name":"Amigo Smokeless Coal Company"},"controller":{"type":"controller","id":"C01620","name":"Henry Paul  Kizer"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03548","name":"Roy L  McCoy et al"},"object":{"type":"mine","id":"4606400","name":"Amigo #4"},"validFrom":"1977-06-24","validTo":"1999-05-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4606400|C03548|1977-06-24|1999-05-20"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06412","name":"Last Chance Coal Company"},"object":{"type":"mine","id":"4606400","name":"Amigo #4"},"validFrom":"1981-09-01","validTo":"1986-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4606400|P06412|1981-09-01|1986-11-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03548","name":"Roy L  McCoy et al"},"object":{"type":"operator","id":"P06412","name":"Last Chance Coal Company"},"validFrom":"1981-09-01","validTo":"1986-11-30","current":false,"derived":true,"evidenceMineId":"4606400","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4606400|P06412|1981-09-01|C03548|1977-06-24|63213"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18757","name":"Amigo Smokeless Coal Company"},"object":{"type":"mine","id":"4606400","name":"Amigo #4"},"validFrom":"1986-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4606400|P18757|1986-12-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01620","name":"Henry Paul  Kizer et al"},"object":{"type":"mine","id":"4606400","name":"Amigo #4"},"validFrom":"1986-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4606400|C01620|1986-12-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01620","name":"Henry Paul  Kizer et al"},"object":{"type":"operator","id":"P18757","name":"Amigo Smokeless Coal Company"},"validFrom":"1986-12-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4606400","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4606400|P18757|1986-12-01|C01620|1986-12-01|55299"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4606400","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"}}