user: Question: How many teams drafted players from the University of Maryland?
Columns: ['Pick #', 'MLS Team', 'Player', 'Position', 'Affiliation']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [33.0, 'Philadelphia Union', 'Kyle Nakazawa', 'Midfielder', 'UCLA Los Angeles Legends']
SQL:

assistant: SELECT COUNT("MLS Team") FROM "Table" WHERE "Affiliation" = 'University of Maryland';