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_59 ( erp_w INTEGER, call_sign VARCHAR, frequency_mhz VARCHAR )

### Question ###
What is the ERP W for the station whose call sign is K248BJ and whose frequency MHz is higher than 97.5?

### Accurate SQL ###

SELECT AVG(erp_w) FROM table_name_59 WHERE call_sign = "k248bj" AND frequency_mhz > 97.5