{"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":"1505324","name":"No 2 Mine"},"operator":{"type":"operator","id":"P20007","name":"Stonewall Mining Inc"},"controller":{"type":"controller","id":"C13672","name":"Stanley Michael R"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01079","name":"Debra Coal Company"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"validFrom":"1950-01-01","validTo":"1975-10-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P01079|1950-01-01|1975-10-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00894","name":"Roberts Jack T & Dennie Bentley"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"validFrom":"1950-01-01","validTo":"1975-10-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|C00894|1950-01-01|1975-10-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00894","name":"Roberts Jack T & Dennie Bentley"},"object":{"type":"operator","id":"P01079","name":"Debra Coal Company"},"validFrom":"1950-01-01","validTo":"1975-10-28","current":false,"derived":true,"evidenceMineId":"1505324","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P01079|1950-01-01|C00894|1950-01-01|50940"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06007","name":"Francis Robert L"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"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":"1505324|C06007|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01579","name":"Dunavant Enterprises Inc"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"validFrom":"1975-06-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|C01579|1975-06-03|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00379","name":"Coal Valley Coal Corp"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"validFrom":"1975-10-29","validTo":"1986-09-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P00379|1975-10-29|1986-09-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01579","name":"Dunavant Enterprises Inc"},"object":{"type":"operator","id":"P00379","name":"Coal Valley Coal Corp"},"validFrom":"1975-10-29","validTo":"1986-09-01","current":false,"derived":true,"evidenceMineId":"1505324","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P00379|1975-10-29|C01579|1975-06-03|55065"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07266","name":"Barbara Kay Coal Corp"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"validFrom":"1986-09-02","validTo":"1989-03-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P07266|1986-09-02|1989-03-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06007","name":"Francis Robert L"},"object":{"type":"operator","id":"P07266","name":"Barbara Kay Coal Corp"},"validFrom":"1986-09-02","validTo":"1989-03-09","current":false,"derived":true,"evidenceMineId":"1505324","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P07266|1986-09-02|C06007|1950-01-01|70550"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13672","name":"Stanley Michael R"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"validFrom":"1988-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|C13672|1988-12-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P20007","name":"Stonewall Mining Inc"},"object":{"type":"mine","id":"1505324","name":"No 2 Mine"},"validFrom":"1989-03-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P20007|1989-03-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13672","name":"Stanley Michael R"},"object":{"type":"operator","id":"P20007","name":"Stonewall Mining Inc"},"validFrom":"1989-03-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"1505324","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1505324|P20007|1989-03-10|C13672|1988-12-01|90754"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1505324","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"}}