user: Question: What is the smallest Crowd number for the Venue named Princes Park?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['North Melbourne', '8.10 (58)', 'St Kilda', '14.12 (96)', 'City of Coburg Oval', 13291.0, '22 May 1965']
SQL:

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