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_65 (frequency_mhz INTEGER, call_sign VARCHAR)
### Question:
Which Frequency MHz is the highest one that has a Call sign of k241an?
### Answer:
SELECT MAX(frequency_mhz) FROM table_name_65 WHERE call_sign = "k241an"