Database: aan_1
Question: Which author had the most papers in the year 2009?
SQL:
SELECT T3.name FROM Paper AS T1 JOIN Author_list AS T2 ON T1.paper_id  =  T2.paper_id JOIN Author AS T3 ON T3.author_id  =  T2.author_id WHERE T1.year  =  2009 GROUP BY T2.author_id ORDER BY count(*) DESC LIMIT 1