user: Question: What is the lowest crowd number at the venue MCG?
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', '17.10 (112)', 'Hawthorn', '17.16 (118)', 'Western Oval', 17285.0, '5 August 1978']
SQL:

assistant: SELECT MIN("Crowd") FROM "Table" WHERE "Venue" = 'MCG';