{"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":"2026-10-17T05:35:58.500035+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":"4102986","name":"Sand Pit #2"},"operator":{"type":"operator","id":"L05141","name":"Sand & Equipment"},"controller":{"type":"controller","id":"M04151","name":"Norsworthy John"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03906","name":"Fresno E & B Sand"},"object":{"type":"mine","id":"4102986","name":"Sand Pit #2"},"validFrom":"1980-03-01","validTo":"1981-06-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102986|L03906|1980-03-01|1981-06-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03128","name":"B H  Goodman  et al"},"object":{"type":"mine","id":"4102986","name":"Sand Pit #2"},"validFrom":"1980-03-01","validTo":"1981-06-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102986|M03128|1980-03-01|1981-06-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03128","name":"B H  Goodman  et al"},"object":{"type":"operator","id":"L03906","name":"Fresno E & B Sand"},"validFrom":"1980-03-01","validTo":"1981-06-01","current":false,"derived":true,"evidenceMineId":"4102986","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102986|L03906|1980-03-01|M03128|1980-03-01|128004"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04151","name":"Norsworthy John"},"object":{"type":"mine","id":"4102986","name":"Sand Pit #2"},"validFrom":"1981-04-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102986|M04151|1981-04-20|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05141","name":"Sand & Equipment"},"object":{"type":"mine","id":"4102986","name":"Sand Pit #2"},"validFrom":"1981-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102986|L05141|1981-06-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04151","name":"Norsworthy John"},"object":{"type":"operator","id":"L05141","name":"Sand & Equipment"},"validFrom":"1981-06-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"4102986","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102986|L05141|1981-06-02|M04151|1981-04-20|131244"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4102986","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}