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

Find the last name of the author with first name 'Amal'.
SELECT lname FROM authors WHERE fname = "Amal"
SELECT "lname" FROM "authors" WHERE "Amal" = "fname"