Complex sentence: Houses compete annually for the House Trophy which is awarded to the winning house at the end of the competition, which consists of academic and sporting events, and is usually presented on Sports Day, the Wednesday of the last week of the Summer Term.
Split into simpler sentences: Houses compete annually for the House Trophy which is awarded to the winning house at the end of the competition, which consists of academic and sporting events. The house with the highest points score is presented the trophy on Sports Day, usually the Wednesday of the last week of the Summer Term.