user: Question: What is the lowest crowd at Corio Oval?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Hawthorn', '10.9 (69)', 'Richmond', '14.18 (102)', 'Glenferrie Oval', 5000.0, '21 August 1926']
SQL:

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