What is the average ERP W for callsign K207BK?
CREATE TABLE table_name_97 (erp_w INTEGER, call_sign VARCHAR)
SELECT AVG(erp_w) FROM table_name_97 WHERE call_sign = "k207bk"
### Context: CREATE TABLE table_name_97 (erp_w INTEGER, call_sign VARCHAR) ### Question: What is the average ERP W for callsign K207BK? ### Answer: SELECT AVG(erp_w) FROM table_name_97 WHERE call_sign = "k207bk"