Complex sentence: However, on the trip there, the boys witnessed a confrontation where a gang of arrogant Dogora students attacked a lone traveler named Katsuichi, who had left the school years ago, dissatisfied with the poor calibre of the students.
Split into simpler sentences: However, on the trip there the boys witnessed a confrontation where a gang of arrogant Dogora students attacked a lone traveler named Katsuichi. Katsuichi had left the school years ago, dissatisfied with the poor calibre of the students.