user: Question: What are the counties who company commander is Captain James R. Jackson and whose election of commission date is April 29, 1861?
Columns: ['Regiment', 'Company', 'Company Commander', 'Date of Election/Commission', 'County']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1st Militia Regiment', '"Home Defenders", Cavalry Company', 'Captain Logan Fitzhugh', 'February 8, 1861', 'Arkansas']
SQL:

assistant: SELECT "County" FROM "Table" WHERE "Date of Election/Commission" = 'April 29, 1861' AND "Company Commander" = 'Captain James R. Jackson';