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_8 (erp_w VARCHAR, call_sign VARCHAR)
### Question:
Name the total number of ERP W when the call sign is w217bf
### Answer:
SELECT COUNT(erp_w) FROM table_name_8 WHERE call_sign = "w217bf"