user: Question: On what date did the match at Lake Oval take place?
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', '14.10 (94)', 'Hawthorn', '13.11 (89)', 'Kardinia Park', 34256.0, '25 April 1980']
SQL:

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