{"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":"0301954","name":"Byrd's Heritage Stone"},"operator":{"type":"operator","id":"0146053","name":"Byrd's Heritage Stone"},"controller":{"type":"controller","id":"0126901","name":"Eric A  Byrd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0084424","name":"Byrd Stone Company"},"object":{"type":"mine","id":"0301954","name":"Byrd's Heritage Stone"},"validFrom":"2007-08-01","validTo":"2016-06-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301954|0084424|2007-08-01|2016-06-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0071211","name":"Bobby A  Byrd"},"object":{"type":"mine","id":"0301954","name":"Byrd's Heritage Stone"},"validFrom":"2007-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301954|0071211|2007-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0071211","name":"Bobby A  Byrd"},"object":{"type":"operator","id":"0084424","name":"Byrd Stone Company"},"validFrom":"2007-08-01","validTo":"2016-06-28","current":false,"derived":true,"evidenceMineId":"0301954","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301954|0084424|2007-08-01|0071211|2007-08-01|10203"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0146053","name":"Byrd's Heritage Stone"},"object":{"type":"mine","id":"0301954","name":"Byrd's Heritage Stone"},"validFrom":"2016-06-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301954|0146053|2016-06-29|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0126901","name":"Eric A  Byrd"},"object":{"type":"mine","id":"0301954","name":"Byrd's Heritage Stone"},"validFrom":"2016-06-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301954|0126901|2016-06-29|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0126901","name":"Eric A  Byrd"},"object":{"type":"operator","id":"0146053","name":"Byrd's Heritage Stone"},"validFrom":"2016-06-29","validTo":null,"current":true,"derived":true,"evidenceMineId":"0301954","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301954|0146053|2016-06-29|0126901|2016-06-29|24655"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0301954","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"}}