user: Question: What is the least amount of people that attended a game when Essendon 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: ['Footscray', '9.14 (68)', 'North Melbourne', '17.15 (117)', 'Western Oval', 19639.0, '26 July 1975']
SQL:

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