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_73 (fleet_size VARCHAR, class VARCHAR)

### Question ###
What is the fleet size of the Vanguard 0-6-0dh class?

### Accurate SQL ###

SELECT fleet_size FROM table_name_73 WHERE class = "vanguard 0-6-0dh"