Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_27733 ( "Pick #" real, "MLS Team" text, "Player" text, "Position" text, "Affiliation" text )

### Question ###
How many teams drafted players from the University of Maryland?

### Accurate SQL ###

SELECT COUNT("MLS Team") FROM table_27733 WHERE "Affiliation" = 'University of Maryland'