{"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":"1502424","name":"May Mine"},"operator":{"type":"operator","id":"P07599","name":"Standard Sign & Signal Company"},"controller":{"type":"controller","id":"C15532","name":"Rag Aktiengesellschaft"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00558","name":"May Victor"},"object":{"type":"mine","id":"1502424","name":"May 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":"1502424|C00558|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00684","name":"Hall Coal Company"},"object":{"type":"mine","id":"1502424","name":"May Mine"},"validFrom":"1950-01-01","validTo":"1973-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P00684|1950-01-01|1973-04-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00562","name":"Hall Leonard--Gary Thornsberry & George Smith"},"object":{"type":"mine","id":"1502424","name":"May Mine"},"validFrom":"1950-01-01","validTo":"1976-08-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|C00562|1950-01-01|1976-08-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00562","name":"Hall Leonard--Gary Thornsberry & George Smith"},"object":{"type":"operator","id":"P00684","name":"Hall Coal Company"},"validFrom":"1950-01-01","validTo":"1973-04-30","current":false,"derived":true,"evidenceMineId":"1502424","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P00684|1950-01-01|C00562|1950-01-01|48082"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00563","name":"Belcher Jack R & Bobby Merrett"},"object":{"type":"mine","id":"1502424","name":"May 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":"1502424|C00563|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00685","name":"Black Nuggett Coal Company"},"object":{"type":"mine","id":"1502424","name":"May Mine"},"validFrom":"1973-05-01","validTo":"1974-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P00685|1973-05-01|1974-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00563","name":"Belcher Jack R & Bobby Merrett"},"object":{"type":"operator","id":"P00685","name":"Black Nuggett Coal Company"},"validFrom":"1973-05-01","validTo":"1974-06-30","current":false,"derived":true,"evidenceMineId":"1502424","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P00685|1973-05-01|C00563|1950-01-01|48083"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00680","name":"May Coal Company"},"object":{"type":"mine","id":"1502424","name":"May Mine"},"validFrom":"1974-07-01","validTo":"1975-02-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P00680|1974-07-01|1975-02-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00558","name":"May Victor"},"object":{"type":"operator","id":"P00680","name":"May Coal Company"},"validFrom":"1974-07-01","validTo":"1975-02-23","current":false,"derived":true,"evidenceMineId":"1502424","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P00680|1974-07-01|C00558|1950-01-01|48068"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15532","name":"Rag Aktiengesellschaft"},"object":{"type":"mine","id":"1502424","name":"May Mine"},"validFrom":"1974-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|C15532|1974-11-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07599","name":"Standard Sign & Signal Company"},"object":{"type":"mine","id":"1502424","name":"May Mine"},"validFrom":"1975-02-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P07599|1975-02-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15532","name":"Rag Aktiengesellschaft"},"object":{"type":"operator","id":"P07599","name":"Standard Sign & Signal Company"},"validFrom":"1975-02-24","validTo":null,"current":true,"derived":true,"evidenceMineId":"1502424","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1502424|P07599|1975-02-24|C15532|1974-11-01|95835"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1502424","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"}}