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 table_name_40 ( cargo VARCHAR, ship_size VARCHAR )

### Question ###
What cargo was contained in a ship size of aframax?

### Accurate SQL ###

SELECT cargo FROM table_name_40 WHERE ship_size = "aframax"