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_41 (episode_number INTEGER, air_date VARCHAR)
### Question:
What kind of Episode Number has a Air Date on 29 june 2007?
### Answer:
SELECT AVG(episode_number) FROM table_name_41 WHERE air_date = "29 june 2007"