When did the episode seen by  is 2.267 million people get aired?
CREATE TABLE table_21055055_2 (au_air_date VARCHAR, viewers__m_ VARCHAR)
SELECT au_air_date FROM table_21055055_2 WHERE viewers__m_ = "2.267"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: 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? [/INST] SELECT au_air_date FROM table_21055055_2 WHERE viewers__m_ = "2.267" </s>