When 15 is the number overall what is the original air date?
CREATE TABLE table_18335117_3 (original_air_date VARCHAR, no_overall VARCHAR)
SELECT original_air_date FROM table_18335117_3 WHERE no_overall = 15
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18335117_3 (original_air_date VARCHAR, no_overall VARCHAR) Question: When 15 is the number overall what is the original air date? [/INST] SELECT original_air_date FROM table_18335117_3 WHERE no_overall = 15 </s>