user: Question: What winning team has Volleyball as the sport?
Columns: ['Date', 'Site', 'Sport', 'Winning team', 'Series']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['August 26, 2006', 'Iowa City', 'Volleyball', 'Iowa State', 'Iowa State 2–0']
SQL:

assistant: SELECT "Winning team" FROM "Table" WHERE "Sport" = 'Volleyball';