What was the air date of the episode with the production code of 322?
CREATE TABLE table_2818164_4 (original_air_date VARCHAR, production_code VARCHAR)
SELECT original_air_date FROM table_2818164_4 WHERE production_code = 322
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2818164_4 (original_air_date VARCHAR, production_code VARCHAR) Question: What was the air date of the episode with the production code of 322? [/INST] SELECT original_air_date FROM table_2818164_4 WHERE production_code = 322 </s>