user: Question: What is the lowest capacity that has Stadion Mladina as the stadium?
Columns: ['Club', 'City', 'Stadium', '2007–08 result', 'Capacity']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Hrvatski Dragovoljac', 'Zagreb', 'NŠC Stjepan Spajić', '2nd in 2.HNL', 5000.0]
SQL:

assistant: SELECT MIN("Capacity") FROM "Table" WHERE "Stadium" = 'Stadion Mladina';