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_25721_4 (region_1 VARCHAR, release VARCHAR)
### Question:
How many region 1's did back to earth have?
### Answer:
SELECT COUNT(region_1) FROM table_25721_4 WHERE release = "Back to Earth"