{"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":"4403807","name":"No 1 Mine"},"operator":{"type":"operator","id":"P04284","name":"Metco Inc"},"controller":{"type":"controller","id":"C03518","name":"Sykes Harry & John"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01418","name":"Roberts Joe H"},"object":{"type":"mine","id":"4403807","name":"No 1 Mine"},"validFrom":"1973-01-01","validTo":"1976-03-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|C01418|1973-01-01|1976-03-22"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01682","name":"Tim Coal Company"},"object":{"type":"mine","id":"4403807","name":"No 1 Mine"},"validFrom":"1974-01-01","validTo":"1976-03-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|P01682|1974-01-01|1976-03-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01418","name":"Roberts Joe H"},"object":{"type":"operator","id":"P01682","name":"Tim Coal Company"},"validFrom":"1974-01-01","validTo":"1976-03-22","current":false,"derived":true,"evidenceMineId":"4403807","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|P01682|1974-01-01|C01418|1973-01-01|54023"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01286","name":"Little Rock Coal Company"},"object":{"type":"mine","id":"4403807","name":"No 1 Mine"},"validFrom":"1976-03-23","validTo":"1976-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|P01286|1976-03-23|1976-11-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01010","name":"Fogarty Carl"},"object":{"type":"mine","id":"4403807","name":"No 1 Mine"},"validFrom":"1976-03-23","validTo":"1976-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|C01010|1976-03-23|1976-11-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01010","name":"Fogarty Carl"},"object":{"type":"operator","id":"P01286","name":"Little Rock Coal Company"},"validFrom":"1976-03-23","validTo":"1976-11-30","current":false,"derived":true,"evidenceMineId":"4403807","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|P01286|1976-03-23|C01010|1976-03-23|51640"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04284","name":"Metco Inc"},"object":{"type":"mine","id":"4403807","name":"No 1 Mine"},"validFrom":"1976-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|P04284|1976-12-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03518","name":"Sykes Harry & John"},"object":{"type":"mine","id":"4403807","name":"No 1 Mine"},"validFrom":"1976-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|C03518|1976-12-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03518","name":"Sykes Harry & John"},"object":{"type":"operator","id":"P04284","name":"Metco Inc"},"validFrom":"1976-12-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4403807","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4403807|P04284|1976-12-01|C03518|1976-12-01|63124"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4403807","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"}}