Database: scholar
Question: How many authors published at sigcse in 2010 ?
SQL:
SELECT DISTINCT COUNT ( t2.paperid ) 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  =  2010 AND t3.venuename  =  "sigcse";