{"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":"1508542","name":"No 14 Mine (D)"},"operator":{"type":"operator","id":"P03319","name":"Star Coal Company"},"controller":{"type":"controller","id":"C02749","name":"John E  Potter"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01953","name":"France Kermit"},"object":{"type":"mine","id":"1508542","name":"No 14 Mine (D)"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508542|C01953|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02749","name":"John E  Potter et al"},"object":{"type":"mine","id":"1508542","name":"No 14 Mine (D)"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508542|C02749|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04335","name":"K & F Coal Company Inc"},"object":{"type":"mine","id":"1508542","name":"No 14 Mine (D)"},"validFrom":"1975-07-01","validTo":"1977-12-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508542|P04335|1975-07-01|1977-12-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01953","name":"France Kermit"},"object":{"type":"operator","id":"P04335","name":"K & F Coal Company Inc"},"validFrom":"1975-07-01","validTo":"1977-12-15","current":false,"derived":true,"evidenceMineId":"1508542","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508542|P04335|1975-07-01|C01953|1950-01-01|56920"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03319","name":"Star Coal Company"},"object":{"type":"mine","id":"1508542","name":"No 14 Mine (D)"},"validFrom":"1977-12-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508542|P03319|1977-12-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02749","name":"John E  Potter et al"},"object":{"type":"operator","id":"P03319","name":"Star Coal Company"},"validFrom":"1977-12-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"1508542","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508542|P03319|1977-12-16|C02749|1950-01-01|60653"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1508542","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"}}