What was the airdate of 21 series number?
CREATE TABLE table_11630008_3 (
    original_air_date VARCHAR,
    series_no VARCHAR
)
SELECT original_air_date FROM table_11630008_3 WHERE series_no = 21
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What was the airdate of 21 series number? ### Input: CREATE TABLE table_11630008_3 (
    original_air_date VARCHAR,
    series_no VARCHAR
) ### Response: SELECT original_air_date FROM table_11630008_3 WHERE series_no = 21