Name who wrote the episode when the viewers was 1.81
CREATE TABLE table_15584067_7 (written_by VARCHAR, us_viewers__million_ VARCHAR)
SELECT written_by FROM table_15584067_7 WHERE us_viewers__million_ = "1.81"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15584067_7 (written_by VARCHAR, us_viewers__million_ VARCHAR) Question: Name who wrote the episode when the viewers was 1.81 [/INST] SELECT written_by FROM table_15584067_7 WHERE us_viewers__million_ = "1.81" </s>