Complex sentence: In the final match, Chris Jericho defended the World Heavyweight Championship against John Cena, who returned from injury after suffering a herniated disc in his neck at Sunmerslam previously.
Split into simpler sentences: In the final match, Chris Jericho defended the World Heavyweight Championship against John Cena. Cena had returned from injury after suffering a herniated disc in his neck at Sunmerslam previously.