user: Question: How many picks are there for defensive back for rounds larger than 11?
Columns: ['Round', 'Pick', 'Player', 'Position', 'School/Club Team']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 15.0, 'Eddie Lee Ivery', 'Running Back', 'Georgia Tech']
SQL:

assistant: SELECT COUNT("Pick") FROM "Table" WHERE "Position" = 'defensive back' AND "Round" > 11.0;