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_33 (call_sign VARCHAR, owner VARCHAR)
### Question:
What is the Call Sign of the Frequency by Owner CKUA Radio Foundation?
### Answer:
SELECT call_sign FROM table_name_33 WHERE owner = "ckua radio foundation"