How many episodes were watched by 12.72 million U.S. viewers?
CREATE TABLE table_12570759_2 (written_by VARCHAR, us_viewers__millions_ VARCHAR)
SELECT COUNT(written_by) FROM table_12570759_2 WHERE us_viewers__millions_ = "12.72"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_12570759_2 (written_by VARCHAR, us_viewers__millions_ VARCHAR) Question: How many episodes were watched by 12.72 million U.S. viewers? [/INST] SELECT COUNT(written_by) FROM table_12570759_2 WHERE us_viewers__millions_ = "12.72" </s>