CREATE TABLE cite (citingpaperid NUMBER, citedpaperid NUMBER)
CREATE TABLE paper (paperid NUMBER, title VARCHAR2, venueid NUMBER, year NUMBER, numciting NUMBER, numcitedby NUMBER, journalid NUMBER)
CREATE TABLE journal (journalid NUMBER, journalname VARCHAR2)
CREATE TABLE dataset (datasetid NUMBER, datasetname VARCHAR2)
CREATE TABLE paperkeyphrase (paperid NUMBER, keyphraseid NUMBER)
CREATE TABLE paperdataset (paperid NUMBER, datasetid NUMBER)
CREATE TABLE author (authorid NUMBER, authorname VARCHAR2)
CREATE TABLE paperfield (fieldid NUMBER, paperid NUMBER)
CREATE TABLE field (fieldid NUMBER)
CREATE TABLE venue (venueid NUMBER, venuename VARCHAR2)
CREATE TABLE keyphrase (keyphraseid NUMBER, keyphrasename VARCHAR2)
CREATE TABLE writes (paperid NUMBER, authorid NUMBER)

ACL papers with less than 5 citations
SELECT DISTINCT cite.citingpaperid FROM cite, paper, venue WHERE paper.paperid = cite.citedpaperid AND venue.venueid = paper.venueid AND venue.venuename = 'ACL' GROUP BY cite.citingpaperid HAVING COUNT(DISTINCT cite.citedpaperid) < 5
SELECT DISTINCT "cite"."citingpaperid" FROM "cite" JOIN "paper" ON "cite"."citedpaperid" = "paper"."paperid" JOIN "venue" ON "paper"."venueid" = "venue"."venueid" AND "venue"."venuename" = 'ACL' GROUP BY "cite"."citingpaperid" HAVING COUNT(DISTINCT "cite"."citedpaperid") < 5