user: Question: When Collingwood played as the home team who was the away team?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Hawthorn', '11.19 (85)', 'St Kilda', '7.19 (61)', 'Princes Park', 15464.0, '28 June 1975']
SQL:

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