Complex sentence: He defeated Cena in a steel cage match to retain the championship on 18 July at the Money in the Bank pay-per-view, retained the title Randy Orton on 15 August at SummerSlam by disqualification.
Split into simpler sentences: He defeated Cena in a steel cage match to retain the championship on 18 July at the Money in the Bank pay-per-view. He retained the title against Randy Orton on 15 August at SummerSlam by disqualification.