user: Question: When is the event 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: ['Fitzroy', '5.15 (45)', 'Richmond', '7.12 (54)', 'Brunswick Street Oval', 20500.0, '19 April 1952']
SQL:

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