{"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":"3401946","name":"Back Forty"},"operator":{"type":"operator","id":"0117365","name":"Donaho Stone LLC"},"controller":{"type":"controller","id":"M10754","name":"Don M  Donaho"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10754","name":"Don M  Donaho et al"},"object":{"type":"mine","id":"3401946","name":"Back Forty"},"validFrom":"1997-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401946|M10754|1997-07-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15233","name":"Donaho Stone"},"object":{"type":"mine","id":"3401946","name":"Back Forty"},"validFrom":"2004-09-14","validTo":"2013-12-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401946|L15233|2004-09-14|2013-12-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10754","name":"Don M  Donaho et al"},"object":{"type":"operator","id":"L15233","name":"Donaho Stone"},"validFrom":"2004-09-14","validTo":"2013-12-12","current":false,"derived":true,"evidenceMineId":"3401946","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401946|L15233|2004-09-14|M10754|1997-07-01|149925"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10754","name":"Don M  Donaho et al"},"object":{"type":"mine","id":"3401946","name":"Back Forty"},"validFrom":"2011-03-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401946|M10754|2011-03-11|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0117365","name":"Donaho Stone LLC"},"object":{"type":"mine","id":"3401946","name":"Back Forty"},"validFrom":"2013-12-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401946|0117365|2013-12-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10754","name":"Don M  Donaho et al"},"object":{"type":"operator","id":"0117365","name":"Donaho Stone LLC"},"validFrom":"2013-12-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"3401946","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401946|0117365|2013-12-13|M10754|2011-03-11|149932"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3401946","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"}}