{"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":"1700838","name":"Lee's Readi Mix"},"operator":{"type":"operator","id":"0161273","name":"Emery Lee & Sons Inc"},"controller":{"type":"controller","id":"0145381","name":"Margaret  Lee"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0093665","name":"James B Lee"},"object":{"type":"mine","id":"1700838","name":"Lee's Readi Mix"},"validFrom":"2008-07-17","validTo":"2018-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700838|0093665|2008-07-17|2018-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0078753","name":"James B  Lee"},"object":{"type":"mine","id":"1700838","name":"Lee's Readi Mix"},"validFrom":"2008-07-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700838|0078753|2008-07-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0078753","name":"James B  Lee"},"object":{"type":"operator","id":"0093665","name":"James B Lee"},"validFrom":"2008-07-17","validTo":"2018-12-31","current":false,"derived":true,"evidenceMineId":"1700838","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700838|0093665|2008-07-17|0078753|2008-07-17|12374"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0161273","name":"Emery Lee & Sons Inc"},"object":{"type":"mine","id":"1700838","name":"Lee's Readi Mix"},"validFrom":"2019-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700838|0161273|2019-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0145381","name":"Margaret  Lee"},"object":{"type":"mine","id":"1700838","name":"Lee's Readi Mix"},"validFrom":"2019-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700838|0145381|2019-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0145381","name":"Margaret  Lee"},"object":{"type":"operator","id":"0161273","name":"Emery Lee & Sons Inc"},"validFrom":"2019-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1700838","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700838|0161273|2019-01-01|0145381|2019-01-01|29760"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1700838","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"}}