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_name_23 (episode_no VARCHAR, original_airdate VARCHAR)
### Question:
What is the episode number of the episode that originally aired on February 4, 2008?
### Answer:
SELECT episode_no FROM table_name_23 WHERE original_airdate = "february 4, 2008"