user: Question: What is the date of the game where Footscray was the away team?
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', '8.10 (58)', 'St Kilda', '10.13 (73)', 'Kardinia Park', 12759.0, '17 August 1957']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Away team" = 'Footscray';