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_17 (episodes INTEGER, tv_station VARCHAR, japanese_title VARCHAR)
### Question:
Which Episodes have a TV Station of ntv, and a Japanese Title of あいのうた?
### Answer:
SELECT AVG(episodes) FROM table_name_17 WHERE tv_station = "ntv" AND japanese_title = "あいのうた"