Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1467951_4 (release_date VARCHAR, dvd_name VARCHAR)
### Question:
How many release dates does volume 4 DVD have?
### Answer:
SELECT COUNT(release_date) FROM table_1467951_4 WHERE dvd_name = "Volume 4"