user: Question: How large was the crowd when the away team was Melbourne?
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', '9.13 (67)', 'St Kilda', '10.10 (70)', 'Glenferrie Oval', 15000.0, '21 April 1928']
SQL:

assistant: SELECT "Crowd" FROM "Table" WHERE "Away team" = 'Melbourne';