user: Question: WHAT IS THE LOWEST ROUND FOR CB POSITION?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 7.0, 7.0, 'Champ Bailey', 'CB', 'Georgia']
SQL:

assistant: SELECT MIN("Round") FROM "Table" WHERE "Position" = 'CB';