user: Question: What was the lowest attendance at Glenferrie 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', '11.18 (84)', 'St Kilda', '15.17 (107)', 'Glenferrie Oval', 18000.0, '8 July 1939']
SQL:

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