<person><first_name>E.</first_name><last_name>Blackburn</last_name><gender>male</gender><economic_assessments><economic_assesment>From circa 1833 to 1837 - Petition</economic_assesment><economic_assesment>From circa 1833 - Answer. Robert G. Vance</economic_assesment><economic_assesment>From 1834 to 1836 - Answer. Robert G. Vance</economic_assesment><economic_assesment>From 1836 to 1838 - Answer. Robert G. Vance</economic_assesment></economic_assessments></person>