Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_15584067_7 (written_by VARCHAR, us_viewers__million_ VARCHAR)
### Question:
Name who wrote the episode when the viewers was 1.81
### Answer:
SELECT written_by FROM table_15584067_7 WHERE us_viewers__million_ = "1.81"