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 (_number_of_discs VARCHAR, release VARCHAR)
### Question:
How many DVDs where were in the complete collection series 1-8 with extras?
### Answer:
SELECT _number_of_discs FROM table_25721_4 WHERE release = "The Complete Collection Series 1-8 with extras"