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_21055055_2 (au_air_date VARCHAR, viewers__m_ VARCHAR)
### Question:
When did the episode seen by  is 2.267 million people get aired?
### Answer:
SELECT au_air_date FROM table_21055055_2 WHERE viewers__m_ = "2.267"