If the amount of U.S. viewers is 2.14 million, who was the episode directed by?
CREATE TABLE table_23399481_2 (
    directed_by VARCHAR,
    us_viewers__in_millions_ VARCHAR
)
SELECT directed_by FROM table_23399481_2 WHERE us_viewers__in_millions_ = "2.14"
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: If the amount of U.S. viewers is 2.14 million, who was the episode directed by? ### Input: CREATE TABLE table_23399481_2 (
    directed_by VARCHAR,
    us_viewers__in_millions_ VARCHAR
) ### Response: SELECT directed_by FROM table_23399481_2 WHERE us_viewers__in_millions_ = "2.14"