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_name_7 (year INTEGER, viewers VARCHAR)
### Question:
Which Year is the lowest when the Viewers are 13.7 million?
### Answer:
SELECT MIN(year) FROM table_name_7 WHERE viewers = "13.7 million"