user: Question: On what date was a match played 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: ['Essendon', '29.16 (190)', 'North Melbourne', '15.13 (103)', 'Windy Hill', 12000.0, '30 June 1934']
SQL:

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