Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### 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