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_9 (exit_date VARCHAR, to_club VARCHAR)
### Question:
What is the exit date of the player who transferred to Cardiff City?
### Answer:
SELECT exit_date FROM table_name_9 WHERE to_club = "cardiff city"