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_255812_1 ( city___municipality VARCHAR, mayor VARCHAR )

### Question ###
What are all the metropolis / municipality where mayor is helen c. De castro

### Accurate SQL ###

SELECT city___municipality FROM table_255812_1 WHERE mayor = "Helen C. De Castro"