user: Question: What is the smallest crowd when Richmond is away?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Footscray', '17.12 (114)', 'Hawthorn', '8.11 (59)', 'Western Oval', 28807.0, '11 June 1955']
SQL:

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