user: Question: Can you tell me a date that has a crowd larger than 20771, and a Venue at Windy Hill?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Footscray', '12.9 (81)', 'South Melbourne', '9.10 (64)', 'Western Oval', 15891.0, '27 May 1972']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Crowd" > 20771.0 AND "Venue" = 'Windy Hill';