What is the date of the episode in which the presenter is Johnny Vaughan?
CREATE TABLE table_20466963_4 (
    date VARCHAR,
    presenter VARCHAR
)
SELECT date FROM table_20466963_4 WHERE presenter = "Johnny Vaughan"
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: What is the date of the episode in which the presenter is Johnny Vaughan? ### Input: CREATE TABLE table_20466963_4 (
    date VARCHAR,
    presenter VARCHAR
) ### Response: SELECT date FROM table_20466963_4 WHERE presenter = "Johnny Vaughan"