{"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":"0404594","name":"Shamrock Lode Mine"},"operator":{"type":"operator","id":"L05735","name":"Marshall Earth Resources Inc"},"controller":{"type":"controller","id":"M04638","name":"Hugh Roy  Marshall"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04638","name":"Hugh Roy  Marshall"},"object":{"type":"mine","id":"0404594","name":"Shamrock Lode Mine"},"validFrom":"1980-02-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0404594|M04638|1980-02-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12281","name":"Phil Pollard"},"object":{"type":"mine","id":"0404594","name":"Shamrock Lode Mine"},"validFrom":"1982-06-01","validTo":"1991-08-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0404594|L12281|1982-06-01|1991-08-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09433","name":"Pollard Phil"},"object":{"type":"mine","id":"0404594","name":"Shamrock Lode Mine"},"validFrom":"1982-06-01","validTo":"1991-08-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0404594|M09433|1982-06-01|1991-08-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09433","name":"Pollard Phil"},"object":{"type":"operator","id":"L12281","name":"Phil Pollard"},"validFrom":"1982-06-01","validTo":"1991-08-26","current":false,"derived":true,"evidenceMineId":"0404594","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0404594|L12281|1982-06-01|M09433|1982-06-01|146372"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05735","name":"Marshall Earth Resources Inc"},"object":{"type":"mine","id":"0404594","name":"Shamrock Lode Mine"},"validFrom":"1991-08-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0404594|L05735|1991-08-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04638","name":"Hugh Roy  Marshall"},"object":{"type":"operator","id":"L05735","name":"Marshall Earth Resources Inc"},"validFrom":"1991-08-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"0404594","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0404594|L05735|1991-08-27|M04638|1980-02-01|132406"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0404594","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"}}