Original sentence: Royce Gracie (born December 12, 1966) is a professional Mixed Martial Arts fighter who revolutionized the martial arts world in the early 1990s with a string of quick victories over larger opponents in the UFC
Edited sentence: He beat four opponents (most of whom were substantially heavier than he is) in one night, a feat which is extremely difficult to accomplish, even by current  fighters.He revolutionized the martial arts world in the early 1990s with a string of quick victories over larger opponents in the UFC, which was co-founded by one of his brothers, Rorion Gracie.Royce Gracie (born December 12, 1966) is a professional Mixed Martial Arts fighter specializing in Gracie Jiu Jitsu