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_15 ( modern_equivalent VARCHAR, pre_1009_province VARCHAR, province_of_silla VARCHAR )

### Question ###
What kind of Modern equivalent that has a Pre-1009 province of sakbang -do, and a Province of Silla of sakju?

### Accurate SQL ###

SELECT modern_equivalent FROM table_name_15 WHERE pre_1009_province = "sakbang -do" AND province_of_silla = "sakju"