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_7 (frequency_mhz VARCHAR, call_sign VARCHAR)
### Question:
Which Frequency MHz has a Call Sign of K218BE?
### Answer:
SELECT frequency_mhz FROM table_name_7 WHERE call_sign = "k218be"