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

how many papers has Mirella Lapata cited ?
SELECT DISTINCT COUNT(cite.citedpaperid) FROM author, cite, writes WHERE author.authorname = 'Mirella Lapata' AND writes.authorid = author.authorid AND writes.paperid = cite.citingpaperid
SELECT DISTINCT COUNT("cite"."citedpaperid") FROM "author" JOIN "writes" ON "author"."authorid" = "writes"."authorid" JOIN "cite" ON "cite"."citingpaperid" = "writes"."paperid" WHERE "author"."authorname" = 'Mirella Lapata'