Premise: Gun Bow (1960 – December 1979) was an American Thoroughbred racehorse. He was one of America's leading older male racehorses in 1964 and 1965 and was later inducted into the Hall of Fame. Gun Bow was noted for his rivalry with five-time American Horse of the Year Kelso.
Hypothesis: Kelso is the name of an American race horse who was active during the 20th century