CREATE TABLE dataset (datasetid INT, datasetname VARCHAR)
CREATE TABLE paperfield (fieldid INT, paperid INT)
CREATE TABLE writes (paperid INT, authorid INT)
CREATE TABLE field (fieldid INT)
CREATE TABLE keyphrase (keyphraseid INT, keyphrasename VARCHAR)
CREATE TABLE journal (journalid INT, journalname VARCHAR)
CREATE TABLE cite (citingpaperid INT, citedpaperid INT)
CREATE TABLE paperdataset (paperid INT, datasetid INT)
CREATE TABLE author (authorid INT, authorname VARCHAR)
CREATE TABLE paper (paperid INT, title VARCHAR, venueid INT, year INT, numciting INT, numcitedby INT, journalid INT)
CREATE TABLE venue (venueid INT, venuename VARCHAR)
CREATE TABLE paperkeyphrase (paperid INT, keyphraseid INT)

keyphrases used by torlak at popl or pldi
SELECT DISTINCT paperkeyphrase.keyphraseid FROM author, paper, paperkeyphrase, venue, writes WHERE author.authorname = 'torlak' AND paper.paperid = paperkeyphrase.paperid AND venue.venueid = paper.venueid AND venue.venuename IN ('popl', 'pldi') AND writes.authorid = author.authorid AND writes.paperid = paper.paperid
SELECT DISTINCT "paperkeyphrase"."keyphraseid" FROM "author" JOIN "writes" ON "author"."authorid" = "writes"."authorid" JOIN "paper" ON "paper"."paperid" = "writes"."paperid" JOIN "paperkeyphrase" ON "paper"."paperid" = "paperkeyphrase"."paperid" JOIN "venue" ON "paper"."venueid" = "venue"."venueid" AND "venue"."venuename" IN ('popl', 'pldi') WHERE "author"."authorname" = 'torlak'