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_21 ( "Equivalent NATO Rank Code" text, "Rank in Spanish" text, "Rank in English" text, "Commonwealth equivalent" text, "US Air Force equivalent" text )

### Question ###
If you're a major general in the US air force then what ranking will you receive in the commonwealth's air force?

### Accurate SQL ###

SELECT "Commonwealth equivalent" FROM table_21 WHERE "US Air Force equivalent" = 'Major General'