<human>:  Why did the Jets and the Sharks fight in the movie ‘East Side Story’?
<bot>: The Jets and the Sharks were rival high school football teams. They were both members of the same conference, but the Jets were the better team and won the conference championship. The Sharks wanted to play for the state championship, but the Jets had already been declared champions. So the Sharks decided to beat up the Jets' players, and the Jets retaliated by beating up the Sharks.