Who wrote the episode that was watched by 2.97 million U.S. viewers? 
CREATE TABLE table_29920800_1 (written_by VARCHAR, us_viewers__million_ VARCHAR)
SELECT written_by FROM table_29920800_1 WHERE us_viewers__million_ = "2.97"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_29920800_1 (written_by VARCHAR, us_viewers__million_ VARCHAR) Question: Who wrote the episode that was watched by 2.97 million U.S. viewers?  [/INST] SELECT written_by FROM table_29920800_1 WHERE us_viewers__million_ = "2.97" </s>