user: Question: Which Mascot has an Enrollment of 640?
Columns: ['School', 'Location', 'Mascot', 'Enrollment', 'IHSAA Class', 'IHSAA Football Class', 'County']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Brown County', 'Nashville', 'Eagles', 755.0, 'AAA', 'AAA', '7 Brown']
SQL:

assistant: SELECT "Mascot" FROM "Table" WHERE "Enrollment" = 640.0;