Database: scholar
Question: In what years did Pedro Domingos publish a paper ?
SQL:
SELECT DISTINCT t3.year FROM writes AS t2 JOIN author AS t1 ON t2.authorid  =  t1.authorid JOIN paper AS t3 ON t2.paperid  =  t3.paperid WHERE t1.authorname  =  "Pedro Domingos" GROUP BY t3.year;