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_4 (quantity_made VARCHAR, fleet_numbers VARCHAR)

### Question ###
What was the quantity of the fleet information for DWWR 50 and 51?

### Accurate SQL ###

SELECT quantity_made FROM table_name_4 WHERE fleet_numbers = "dwwr 50 and 51"