Which series had a release on 1939-07-15 with the 8863 production number?
CREATE TABLE table_name_53 (series VARCHAR, release_date VARCHAR, production_num VARCHAR)
SELECT series FROM table_name_53 WHERE release_date = "1939-07-15" AND production_num = "8863"
### Context: CREATE TABLE table_name_53 (series VARCHAR, release_date VARCHAR, production_num VARCHAR) ### Question: Which series had a release on 1939-07-15 with the 8863 production number? ### Answer: SELECT series FROM table_name_53 WHERE release_date = "1939-07-15" AND production_num = "8863"