Database: scholar
Question: give me the keywords used by Luke Zettlemoyer
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";