Complex sentence: Each year the senior students of both colleges participate in eight sports for seventeen shields in the winter season, the school that wins the majority of the shields is the overall winner of the Carnival and "Mercedes-Ignatius" Shield.
Split into simpler sentences: Each year the senior students of both colleges participate in eight sports for seventeen shields in the winter season. The school that wins the majority of the shields is the overall winner of the Carnival and of the "Mercedes-Ignatius" Shield.