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_13 ( call_sign VARCHAR, erp_w INTEGER )

### Question ###
What call sign has ERP W greater than 197?

### Accurate SQL ###

SELECT call_sign FROM table_name_13 WHERE erp_w > 197