What report did Jack Brabham win?
CREATE TABLE table_name_21 (report VARCHAR, winning_driver VARCHAR)
SELECT report FROM table_name_21 WHERE winning_driver = "jack brabham"
### Context: CREATE TABLE table_name_21 (report VARCHAR, winning_driver VARCHAR) ### Question: What report did Jack Brabham win? ### Answer: SELECT report FROM table_name_21 WHERE winning_driver = "jack brabham"