{"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":"4404607","name":"No 1 Strip"},"operator":{"type":"operator","id":"P07024","name":"Magnum Contractors"},"controller":{"type":"controller","id":"C05015","name":"Collins Franklin T"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04691","name":"Titan Coal Corp"},"object":{"type":"mine","id":"4404607","name":"No 1 Strip"},"validFrom":"1977-01-01","validTo":"1977-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404607|P04691|1977-01-01|1977-08-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03871","name":"Pilkenton Earl"},"object":{"type":"mine","id":"4404607","name":"No 1 Strip"},"validFrom":"1977-01-01","validTo":"1977-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404607|C03871|1977-01-01|1977-08-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03871","name":"Pilkenton Earl"},"object":{"type":"operator","id":"P04691","name":"Titan Coal Corp"},"validFrom":"1977-01-01","validTo":"1977-08-31","current":false,"derived":true,"evidenceMineId":"4404607","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404607|P04691|1977-01-01|C03871|1977-01-01|64077"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07024","name":"Magnum Contractors"},"object":{"type":"mine","id":"4404607","name":"No 1 Strip"},"validFrom":"1977-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404607|P07024|1977-09-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05015","name":"Collins Franklin T"},"object":{"type":"mine","id":"4404607","name":"No 1 Strip"},"validFrom":"1977-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404607|C05015|1977-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05015","name":"Collins Franklin T"},"object":{"type":"operator","id":"P07024","name":"Magnum Contractors"},"validFrom":"1977-09-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4404607","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404607|P07024|1977-09-01|C05015|1977-09-01|67269"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4404607","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"}}