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

best paper in EMNLP 2015 ?
SELECT DISTINCT COUNT(DISTINCT cite.citingpaperid), paper.paperid FROM cite, paper, venue WHERE paper.paperid = cite.citedpaperid AND paper.year = 2015 AND venue.venueid = paper.venueid AND venue.venuename = 'EMNLP' GROUP BY paper.paperid ORDER BY COUNT(DISTINCT cite.citingpaperid) DESC
SELECT DISTINCT COUNT(DISTINCT "cite"."citingpaperid"), "paper"."paperid" FROM "cite" JOIN "paper" ON "cite"."citedpaperid" = "paper"."paperid" AND "paper"."year" = 2015 JOIN "venue" ON "paper"."venueid" = "venue"."venueid" AND "venue"."venuename" = 'EMNLP' GROUP BY "paper"."paperid" ORDER BY COUNT(DISTINCT "cite"."citingpaperid") DESC NULLS LAST