user: Question: How many spectators watched when the away team was Collingwood?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Footscray', '19.17 (131)', 'St Kilda', '7.18 (60)', 'Yarraville Oval', 6000.0, '11 July 1942']
SQL:

assistant: SELECT SUM("Crowd") FROM "Table" WHERE "Away team" = 'Collingwood';