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

Who is the author of the paper titled 'Binders Unbound'? Give me the last name.
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"