user: Question: How many Rounds have a defensive end Pick?
Columns: ['Round', 'Pick #', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 9.0, 9.0, 'Fred Taylor', 'Running Back', 'Florida']
SQL:

assistant: SELECT COUNT("Round") FROM "Table" WHERE "Position" = 'defensive end';