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_19422702_1 (us_airdate VARCHAR, no_in_season VARCHAR)
### Question:
How many U.S. air dates were from an episode in Season 4?
### Answer:
SELECT COUNT(us_airdate) FROM table_19422702_1 WHERE no_in_season = 4