user: Question: When did Collingwood play?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['St Kilda', '10.9 (69)', 'South Melbourne', '9.16 (70)', 'Junction Oval', 13000.0, '9 July 1932']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Home team" = 'Collingwood';