user: Question: What's the pick number of the player whose position is CB?
Columns: ['Pick #', 'CFL Team', 'Player', 'Position', 'College']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [35.0, 'Hamilton Tiger-Cats', 'Michael Roberts', 'CB', 'Ohio State']
SQL:

assistant: SELECT "Pick #" FROM "Table" WHERE "Position" = 'CB';