Database: scholar
Question: who are all the co-authors of Noah A Smith ?
SQL:
SELECT DISTINCT t1.authorid FROM writes AS t3 JOIN author AS t2 ON t3.authorid  =  t2.authorid JOIN writes AS t4 ON t4.paperid  =  t3.paperid JOIN author AS t1 ON t4.authorid  =  t1.authorid WHERE t2.authorname  =  "Noah A Smith";