Database: academic
Question: return me the number of papers in " University of Michigan " in Databases area .
SQL:
SELECT COUNT ( DISTINCT t4.title ) FROM domain_author AS t6 JOIN author AS t1 ON t6.aid  =  t1.aid JOIN DOMAIN AS t3 ON t3.did  =  t6.did JOIN domain_publication AS t2 ON t3.did  =  t2.did JOIN organization AS t5 ON t5.oid  =  t1.oid JOIN publication AS t4 ON t4.pid  =  t2.pid WHERE t3.name  =  "Databases" AND t5.name  =  "University of Michigan";