{"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":"2901377","name":"E & R Contractors"},"operator":{"type":"operator","id":"0081824","name":"E & R Contractors"},"controller":{"type":"controller","id":"0068911","name":"Jose C  Garcia"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L32823","name":"E & R Roofing Company Inc"},"object":{"type":"mine","id":"2901377","name":"E & R Contractors"},"validFrom":"1987-06-01","validTo":"2007-05-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901377|L32823|1987-06-01|2007-05-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M32823","name":"Eleuterio R  Garcia"},"object":{"type":"mine","id":"2901377","name":"E & R Contractors"},"validFrom":"1987-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901377|M32823|1987-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M32823","name":"Eleuterio R  Garcia"},"object":{"type":"operator","id":"L32823","name":"E & R Roofing Company Inc"},"validFrom":"1987-06-01","validTo":"2007-05-16","current":false,"derived":true,"evidenceMineId":"2901377","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901377|L32823|1987-06-01|M32823|1987-06-01|161340"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0081824","name":"E & R Contractors"},"object":{"type":"mine","id":"2901377","name":"E & R Contractors"},"validFrom":"2007-05-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901377|0081824|2007-05-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0068911","name":"Jose C  Garcia"},"object":{"type":"mine","id":"2901377","name":"E & R Contractors"},"validFrom":"2007-05-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901377|0068911|2007-05-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0068911","name":"Jose C  Garcia"},"object":{"type":"operator","id":"0081824","name":"E & R Contractors"},"validFrom":"2007-05-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"2901377","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901377|0081824|2007-05-17|0068911|2007-05-17|9733"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2901377","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"}}