user: Question: I want to know the average crowd for away team of 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: ['Geelong', '12.22 (94)', 'St Kilda', '11.10 (76)', 'Corio Oval', 6500.0, '6 July 1940']
SQL:

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