{"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":"4404948","name":"No 2 Mine"},"operator":{"type":"operator","id":"P10050","name":"Eastern Coal Company"},"controller":{"type":"controller","id":"C07735","name":"Roberts Kenes P Jr & Sr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05879","name":"Bobby Gene  Yates"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1977-09-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|C05879|1977-09-19|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07095","name":"Triple Y Coal Corp"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1978-02-01","validTo":"1978-10-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P07095|1978-02-01|1978-10-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05879","name":"Bobby Gene  Yates"},"object":{"type":"operator","id":"P07095","name":"Triple Y Coal Corp"},"validFrom":"1978-02-01","validTo":"1978-10-30","current":false,"derived":true,"evidenceMineId":"4404948","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P07095|1978-02-01|C05879|1977-09-19|70160"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08737","name":"K & R Coal Company Inc"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1978-10-31","validTo":"1979-01-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P08737|1978-10-31|1979-01-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06941","name":"Roberts Fred Jr"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1978-10-31","validTo":"1979-01-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|C06941|1978-10-31|1979-01-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06941","name":"Roberts Fred Jr"},"object":{"type":"operator","id":"P08737","name":"K & R Coal Company Inc"},"validFrom":"1978-10-31","validTo":"1979-01-15","current":false,"derived":true,"evidenceMineId":"4404948","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P08737|1978-10-31|C06941|1978-10-31|73265"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P09068","name":"Hy-Hope Coal Company Inc"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1979-01-16","validTo":"1980-01-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P09068|1979-01-16|1980-01-24"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07168","name":"Warrix James Curtis"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1979-01-16","validTo":"1980-01-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|C07168|1979-01-16|1980-01-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07168","name":"Warrix James Curtis"},"object":{"type":"operator","id":"P09068","name":"Hy-Hope Coal Company Inc"},"validFrom":"1979-01-16","validTo":"1980-01-24","current":false,"derived":true,"evidenceMineId":"4404948","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P09068|1979-01-16|C07168|1979-01-16|73965"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07735","name":"Roberts Kenes P Jr & Sr"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1980-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|C07735|1980-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10050","name":"Eastern Coal Company"},"object":{"type":"mine","id":"4404948","name":"No 2 Mine"},"validFrom":"1980-01-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P10050|1980-01-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07735","name":"Roberts Kenes P Jr & Sr"},"object":{"type":"operator","id":"P10050","name":"Eastern Coal Company"},"validFrom":"1980-01-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"4404948","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404948|P10050|1980-01-25|C07735|1980-01-01|75580"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4404948","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"}}