CREATE TABLE authors (authid NUMBER, lname CLOB, fname CLOB)
CREATE TABLE authorship (authid NUMBER, instid NUMBER, paperid NUMBER, authorder NUMBER)
CREATE TABLE papers (paperid NUMBER, title CLOB)
CREATE TABLE inst (instid NUMBER, name CLOB, country CLOB)

What are the last names of the author of the paper titled 'Binders Unbound'?
SELECT t1.lname FROM authors AS t1 JOIN authorship AS t2 ON t1.authid = t2.authid JOIN papers AS t3 ON t2.paperid = t3.paperid WHERE t3.title = "Binders Unbound"
SELECT "t1"."lname" FROM "authors" "t1" JOIN "authorship" "t2" ON "t1"."authid" = "t2"."authid" JOIN "papers" "t3" ON "Binders Unbound" = "t3"."title" AND "t2"."paperid" = "t3"."paperid"