{"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":"2026-10-18T09:31:49.615908+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":"1200739","name":"Meshberger Brothers Stone Corp Pennville"},"operator":{"type":"operator","id":"L00237","name":"Meshberger Brothers Stone Corp"},"controller":{"type":"controller","id":"M00198","name":"Carolyn S  Fryback; Walter Craig  Coshow"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00237","name":"Meshberger Brothers Stone Corp"},"object":{"type":"mine","id":"1200739","name":"Meshberger Brothers Stone Corp Pennville"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1200739|L00237|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00198","name":"Carolyn S  Fryback et al"},"object":{"type":"mine","id":"1200739","name":"Meshberger Brothers Stone Corp Pennville"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1200739|M00198|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00198","name":"Carolyn S  Fryback et al"},"object":{"type":"operator","id":"L00237","name":"Meshberger Brothers Stone Corp"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1200739","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1200739|L00237|1950-01-01|M00198|1950-01-01|107244"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00198","name":"Walter Craig  Coshow et al"},"object":{"type":"operator","id":"L00237","name":"Meshberger Brothers Stone Corp"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1200739","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1200739|L00237|1950-01-01|M00198|1950-01-01|107245"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1200739","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}