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_name_77 (release_date VARCHAR, production_num VARCHAR)
### Question:
What release date has 6998 as the production num.?
### Answer:
SELECT release_date FROM table_name_77 WHERE production_num = "6998"