user: Question: On what date was there both a crowd larger than 16570 and the away team was Footscray?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Geelong', '9.8 (62)', 'St Kilda', '3.12 (30)', 'Corio Oval', 12500.0, '16 May 1925']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Crowd" > 16570.0 AND "Away team" = 'Footscray';