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_56210 ( "Class" text, "Wheel arrangement" text, "Manufacturer" text, "Year made" text, "Quantity made" text, "Quantity preserved" text, "Year(s) withdrawn" text )

### Question ###
What was the quantity preserved for quantity made of 15?

### Accurate SQL ###

SELECT "Quantity preserved" FROM table_56210 WHERE "Quantity made" = '15'