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