user: Question: When was the game when 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: ['Collingwood', '12.19 (91)', 'Footscray', '4.5 (29)', 'Victoria Park', 20500.0, '31 May 1952']
SQL:

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