Complex sentence: Many times the participants of the Rose Bowl game have been the winners of the respective UCLA-USC rivalry and Michigan-Ohio State rivalry games, although there have been instances where the loser of the rivalry game still won the conference championship.
Split into simpler sentences: Many times the participants of the Rose Bowl game have been the winners of the respective UCLA-USC rivalry and Michigan-Ohio State rivalry games. Although there have been instances where the loser of the rivalry game still won the conference championship.