How many Huckleberry Hound episodes were aired on 1960.09.18?
CREATE TABLE table_19860361_4 (
    huckleberry_hound VARCHAR,
    air_date VARCHAR
)
SELECT COUNT(huckleberry_hound) FROM table_19860361_4 WHERE air_date = "1960.09.18"
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 Huckleberry Hound episodes were aired on 1960.09.18? ### Input: CREATE TABLE table_19860361_4 (
    huckleberry_hound VARCHAR,
    air_date VARCHAR
) ### Response: SELECT COUNT(huckleberry_hound) FROM table_19860361_4 WHERE air_date = "1960.09.18"