user: Question: How many events did clay win?
Columns: ['!Event', 'Round', 'Surface', 'Winner', 'Opponent', 'Result']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Wimbledon', 'Final', 'Grass', 'Roger Federer', 'Andy Roddick']
SQL:

assistant: SELECT COUNT("!Event") FROM "Table" WHERE "Winner" = 'clay';