How many different end dates are there for the series seen by 4.2 million people?
CREATE TABLE table_24057191_2 (end_date VARCHAR, average_viewers__millions_ VARCHAR)
SELECT COUNT(end_date) FROM table_24057191_2 WHERE average_viewers__millions_ = "4.2"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_24057191_2 (end_date VARCHAR, average_viewers__millions_ VARCHAR) Question: How many different end dates are there for the series seen by 4.2 million people? [/INST] SELECT COUNT(end_date) FROM table_24057191_2 WHERE average_viewers__millions_ = "4.2" </s>