Who wrote the episode seen by 10.64 million people in the US?
CREATE TABLE table_23528223_2 (
    written_by VARCHAR,
    us_viewers__millions_ VARCHAR
)
SELECT written_by FROM table_23528223_2 WHERE us_viewers__millions_ = "10.64"
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: Who wrote the episode seen by 10.64 million people in the US? ### Input: CREATE TABLE table_23528223_2 (
    written_by VARCHAR,
    us_viewers__millions_ VARCHAR
) ### Response: SELECT written_by FROM table_23528223_2 WHERE us_viewers__millions_ = "10.64"