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_50 (frequency VARCHAR, power__kw_ VARCHAR, call_sign VARCHAR)
### Question:
What's the frequency of the call sign DYFR with 10KW of power?
### Answer:
SELECT frequency FROM table_name_50 WHERE power__kw_ = "10kw" AND call_sign = "dyfr"