{"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":"1509709","name":"No 3 Mine"},"operator":{"type":"operator","id":"P08063","name":"A & B Coal Company"},"controller":{"type":"controller","id":"C06500","name":"Fields Bill & Archie Short"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02267","name":"Three Way Coal Company"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1976-05-19","validTo":"1976-10-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P02267|1976-05-19|1976-10-06"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01936","name":"Sandlin Daniel"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1976-05-19","validTo":"1976-10-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|C01936|1976-05-19|1976-10-06"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01936","name":"Sandlin Daniel"},"object":{"type":"operator","id":"P02267","name":"Three Way Coal Company"},"validFrom":"1976-05-19","validTo":"1976-10-06","current":false,"derived":true,"evidenceMineId":"1509709","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P02267|1976-05-19|C01936|1976-05-19|56876"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03395","name":"Three Way Coal Company"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1976-10-07","validTo":"1977-05-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P03395|1976-10-07|1977-05-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02811","name":"Adams Larry Dean"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1976-10-07","validTo":"1977-05-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|C02811|1976-10-07|1977-05-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02811","name":"Adams Larry Dean"},"object":{"type":"operator","id":"P03395","name":"Three Way Coal Company"},"validFrom":"1976-10-07","validTo":"1977-05-22","current":false,"derived":true,"evidenceMineId":"1509709","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P03395|1976-10-07|C02811|1976-10-07|60863"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06920","name":"Explorer Coal Company Inc"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1977-05-23","validTo":"1978-05-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P06920|1977-05-23|1978-05-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05626","name":"Richmond Clifford Jr"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1977-05-23","validTo":"1978-05-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|C05626|1977-05-23|1978-05-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05626","name":"Richmond Clifford Jr"},"object":{"type":"operator","id":"P06920","name":"Explorer Coal Company Inc"},"validFrom":"1977-05-23","validTo":"1978-05-14","current":false,"derived":true,"evidenceMineId":"1509709","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P06920|1977-05-23|C05626|1977-05-23|69362"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06500","name":"Fields Bill & Archie Short"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1978-04-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|C06500|1978-04-24|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08063","name":"A & B Coal Company"},"object":{"type":"mine","id":"1509709","name":"No 3 Mine"},"validFrom":"1978-05-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P08063|1978-05-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06500","name":"Fields Bill & Archie Short"},"object":{"type":"operator","id":"P08063","name":"A & B Coal Company"},"validFrom":"1978-05-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"1509709","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1509709|P08063|1978-05-15|C06500|1978-04-24|71988"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1509709","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"}}