user: Question: What is the highest capacity for the venue of the club, Vihren?
Columns: ['Club', 'Location', 'Manager', 'Venue', 'Capacity']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Belasitsa', 'Petrich', 'Miroslav Mitev Category:Articles with hCards', 'Tsar Samuil Stadium', 15000.0]
SQL:

assistant: SELECT MAX("Capacity") FROM "Table" WHERE "Club" = 'Vihren';