user: Question: During which round was a Hawkeyes player selected for the Defensive Back position?
Columns: ['Player', 'Position', 'Round', 'Pick', 'NFL Club']
Types: ['text', 'text', 'real', 'real', 'text']
Sample row: ['Dallas Clark', 'Tight End', 1.0, 24.0, 'Indianapolis Colts']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Position" = 'Defensive Back';