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_17467447_1 (original_airdate VARCHAR, us_viewers__million_ VARCHAR)
### Question:
What is the air date when the U.S. viewers was 5.50 million?
### Answer:
SELECT original_airdate FROM table_17467447_1 WHERE us_viewers__million_ = "5.50"