Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE inst ( instid number, name text, country text )
TABLE: CREATE TABLE papers ( paperid number, title text )
TABLE: CREATE TABLE authorship ( authid number, instid number, paperid number, authorder number )
TABLE: CREATE TABLE authors ( authid number, lname text, fname text )

### Question ###
Find the last name of the author with first name 'Amal'.

### Accurate SQL ###

SELECT lname FROM authors WHERE fname = "Amal"