Question: Bowling has been part of the pan american games since the games held in which city ?
Sentence (from "Bowling at the Pan American Games"): Bowling — primarily in the form of the tenpin sport, as regulated by the World Bowling organization (the Pan American Games' tenpin events are governed by World Bowling's "PABCON" American Zone division), has been a sport at the Pan American Games since the 1991 Pan American Games.
Relevant evidence: Yes