Database: scholar
Question: who had papers at acl 2016 ?
SQL:
SELECT DISTINCT t1.authorid FROM venue AS t3 JOIN paper AS t2 ON t3.venueid  =  t2.venueid JOIN writes AS t1 ON t1.paperid  =  t2.paperid WHERE t2.year  =  2016 AND t3.venuename  =  "acl";