user: Question: How many players had a best winning average of 20?
Columns: ['Players', 'Games Won', 'Games Lost', 'Total points', 'Grand Average', 'Best Winning Average', 'Best Run']
Types: ['text', 'real', 'real', 'real', 'text', 'text', 'real']
Sample row: ['Cyrille Dion', 5.0, 0.0, 2500.0, '12.76-202', '20', 138.0]
SQL:

assistant: SELECT COUNT("Games Won") FROM "Table" WHERE "Best Winning Average" = '20';