How many release dates does volume 4 DVD have?
CREATE TABLE table_1467951_4 (release_date VARCHAR, dvd_name VARCHAR)
SELECT COUNT(release_date) FROM table_1467951_4 WHERE dvd_name = "Volume 4"
### 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"