user: Question: What is the highest crowd number of the game where the away team was South 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: ['St Kilda', '11.21 (87)', 'South Melbourne', '9.17 (71)', 'Moorabbin Oval', 15736.0, '19 April 1975']
SQL:

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