When there are 12.70 million u.s. viewers who is the director?
CREATE TABLE table_17467147_1 (
    directed_by VARCHAR,
    us_viewers__million_ VARCHAR
)
SELECT directed_by FROM table_17467147_1 WHERE us_viewers__million_ = "12.70"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: When there are 12.70 million u.s. viewers who is the director? ### Input: CREATE TABLE table_17467147_1 (
    directed_by VARCHAR,
    us_viewers__million_ VARCHAR
) ### Response: SELECT directed_by FROM table_17467147_1 WHERE us_viewers__million_ = "12.70"