user: Question: When was the game played at Princes Park?
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', '21.16 (142)', 'Hawthorn', '6.15 (51)', 'Windy Hill', 13277.0, '10 June 1967']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Venue" = 'Princes Park';