Database: scholar
Question: what kind of papers does Luke Zettlemoyer publish
SQL: select distinct t1.keyphraseid from paperkeyphrase as t2 join keyphrase as t1 on t2.keyphraseid  =  t1.keyphraseid join paper as t3 on t3.paperid  =  t2.paperid join writes as t4 on t4.paperid  =  t3.paperid join author as t5 on t4.authorid  =  t5.authorid where t5.authorname  =  "luke zettlemoyer";