user: Question: When Richmond is the away team, what is the crowd size?
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', '18.15 (123)', 'South Melbourne', '10.8 (68)', 'Junction Oval', 20300.0, '27 June 1964']
SQL:

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