What is the original air date for episode 15 of season 6?
CREATE TABLE table_10718868_2 (original_air_date VARCHAR, no_in_season VARCHAR)
SELECT original_air_date FROM table_10718868_2 WHERE no_in_season = 15
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_10718868_2 (original_air_date VARCHAR, no_in_season VARCHAR) Question: What is the original air date for episode 15 of season 6? [/INST] SELECT original_air_date FROM table_10718868_2 WHERE no_in_season = 15 </s>