What is the air date of the episode with the production code 6acx19? 
CREATE TABLE table_22261877_1 (original_air_date VARCHAR, production_code VARCHAR)
SELECT original_air_date FROM table_22261877_1 WHERE production_code = "6ACX19"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_22261877_1 (original_air_date VARCHAR, production_code VARCHAR) Question: What is the air date of the episode with the production code 6acx19?  [/INST] SELECT original_air_date FROM table_22261877_1 WHERE production_code = "6ACX19" </s>