user: Question: What college did the Defensive Back attend?
Columns: ['Pick #', 'NFL Team', 'Player', 'Position', 'College']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [11.0, 'Los Angeles Raiders', 'Anthony Smith', 'Defensive End', 'Arizona']
SQL:

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