How many U.S. air dates were from an episode in Season 4?
CREATE TABLE table_19422702_1 (us_airdate VARCHAR, no_in_season VARCHAR)
SELECT COUNT(us_airdate) FROM table_19422702_1 WHERE no_in_season = 4
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: 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? [/INST] SELECT COUNT(us_airdate) FROM table_19422702_1 WHERE no_in_season = 4 </s>