user: Question: What was the date of the game at Lake Oval?
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', '8.10 (58)', 'Hawthorn', '20.14 (134)', 'Western Oval', 15933.0, '31 May 1975']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Venue" = 'Lake Oval';