Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_21781578_2 (original_air_date VARCHAR, season_no VARCHAR)
### Question:
What was the original air date for season number 2?
### Answer:
SELECT original_air_date FROM table_21781578_2 WHERE season_no = 2