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 ( call_sign VARCHAR, erp_w VARCHAR )

### Question ###
What is the call sign with a 222 erp w?

### Accurate SQL ###

SELECT call_sign FROM table_name_15 WHERE erp_w = 222