{"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":"1511714","name":"Green Grove No 2"},"operator":{"type":"operator","id":"P02643","name":"Green Grove Coal Company"},"controller":{"type":"controller","id":"C02279","name":"Nesbit William A Iii"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02279","name":"Nesbit William A Iii"},"object":{"type":"mine","id":"1511714","name":"Green Grove No 2"},"validFrom":"1975-02-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511714|C02279|1975-02-04|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03015","name":"Mc Gaw John Scott"},"object":{"type":"mine","id":"1511714","name":"Green Grove No 2"},"validFrom":"1976-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511714|C03015|1976-03-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03653","name":"Dawn Coal Company"},"object":{"type":"mine","id":"1511714","name":"Green Grove No 2"},"validFrom":"1978-12-01","validTo":"1979-12-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511714|P03653|1978-12-01|1979-12-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03015","name":"Mc Gaw John Scott"},"object":{"type":"operator","id":"P03653","name":"Dawn Coal Company"},"validFrom":"1978-12-01","validTo":"1979-12-09","current":false,"derived":true,"evidenceMineId":"1511714","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511714|P03653|1978-12-01|C03015|1976-03-01|61649"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02643","name":"Green Grove Coal Company"},"object":{"type":"mine","id":"1511714","name":"Green Grove No 2"},"validFrom":"1979-12-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511714|P02643|1979-12-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02279","name":"Nesbit William A Iii"},"object":{"type":"operator","id":"P02643","name":"Green Grove Coal Company"},"validFrom":"1979-12-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"1511714","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511714|P02643|1979-12-10|C02279|1975-02-04|58025"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1511714","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"}}