How many millions of US viewers watched the episode written by Jack Sanderson?
CREATE TABLE table_27462177_1 (
    us_viewers__millions_ VARCHAR,
    written_by VARCHAR
)
SELECT us_viewers__millions_ FROM table_27462177_1 WHERE written_by = "Jack Sanderson"
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: How many millions of US viewers watched the episode written by Jack Sanderson? ### Input: CREATE TABLE table_27462177_1 (
    us_viewers__millions_ VARCHAR,
    written_by VARCHAR
) ### Response: SELECT us_viewers__millions_ FROM table_27462177_1 WHERE written_by = "Jack Sanderson"