What was the original air date of series number 10?
CREATE TABLE table_name_20 (original_air_date INTEGER, series_number VARCHAR)
SELECT AVG(original_air_date) FROM table_name_20 WHERE series_number = 10
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_20 (original_air_date INTEGER, series_number VARCHAR) Question: What was the original air date of series number 10? [/INST] SELECT AVG(original_air_date) FROM table_name_20 WHERE series_number = 10 </s>