what is the class of the station with erp w more than 30?
CREATE TABLE table_name_54 (class VARCHAR, erp_w INTEGER)
SELECT class FROM table_name_54 WHERE erp_w > 30
### Context: CREATE TABLE table_name_54 (class VARCHAR, erp_w INTEGER) ### Question: what is the class of the station with erp w more than 30? ### Answer: SELECT class FROM table_name_54 WHERE erp_w > 30