Complex sentence: The event, originally subtitled "Hughes vs. St. Pierre," was scheduled to feature a UFC Welterweight Title match between champion Matt Hughes and Georges St. Pierre; however, a groin injury--which was reported early in August--forced St. Pierre off the card.
Split into simpler sentences: The event, originally subtitled "Hughes vs. St. Pierre," was scheduled to feature a UFC Welterweight Title match between champion Matt Hughes and Georges St. Pierre. However, a groin injury--which was reported early in August--forced St. Pierre off the card.