Database: aan_1
Question: Which 3 affiliations had the most papers in 2009?
SQL:
SELECT T3.name FROM Paper AS T1 JOIN Author_list AS T2 ON T1.paper_id  =  T2.paper_id JOIN Affiliation AS T3 ON T2.affiliation_id  =  T3.affiliation_id WHERE T1.year  =  2009 GROUP BY T2.affiliation_id ORDER BY count(*) DESC LIMIT 3