{"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":"2100496","name":"Plaisted Sand"},"operator":{"type":"operator","id":"L08096","name":"Plaisted Companies Inc."},"controller":{"type":"controller","id":"M06436","name":"Todd R  Plaisted"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08095","name":"O G Hanson & Son Inc"},"object":{"type":"mine","id":"2100496","name":"Plaisted Sand"},"validFrom":"1950-01-01","validTo":"1985-09-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100496|L08095|1950-01-01|1985-09-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06435","name":"Joseph  Hanson"},"object":{"type":"mine","id":"2100496","name":"Plaisted Sand"},"validFrom":"1950-01-01","validTo":"1985-09-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100496|M06435|1950-01-01|1985-09-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06435","name":"Joseph  Hanson"},"object":{"type":"operator","id":"L08095","name":"O G Hanson & Son Inc"},"validFrom":"1950-01-01","validTo":"1985-09-10","current":false,"derived":true,"evidenceMineId":"2100496","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100496|L08095|1950-01-01|M06435|1950-01-01|138523"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08096","name":"Plaisted Companies Inc."},"object":{"type":"mine","id":"2100496","name":"Plaisted Sand"},"validFrom":"1985-09-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100496|L08096|1985-09-11|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06436","name":"Todd R  Plaisted"},"object":{"type":"mine","id":"2100496","name":"Plaisted Sand"},"validFrom":"1985-09-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100496|M06436|1985-09-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06436","name":"Todd R  Plaisted"},"object":{"type":"operator","id":"L08096","name":"Plaisted Companies Inc."},"validFrom":"1985-09-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"2100496","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100496|L08096|1985-09-11|M06436|1985-09-11|138524"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2100496","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"}}