user: Question: How big was the crowd when Richmond was the away team?
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', '12.21 (93)', 'South Melbourne', '10.12 (72)', 'Corio Oval', 5000.0, '25 May 1940']
SQL:

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