user: Question: How many teams were established at University of Maryland?
Columns: ['Institution', 'Location', 'Nickname', 'Enrollment', 'Established']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['Villanova University', 'Villanova, PA', 'Wildcats', 6335.0, 2006.0]
SQL:

assistant: SELECT COUNT("Established") FROM "Table" WHERE "Institution" = 'University of Maryland';