Complex sentence: At Money in the Bank, Dean Ambrose won the WWE World Heavyweight Championship after winning the Money in the Bank ladder match and cashing in on Seth Rollins after Rollins defeated Roman Reigns to win the title.
Split into simpler sentences: At Money in the Bank, Dean Ambrose won the Money in the Bank ladder match. Later in the event, Seth Rollins defeated Roman Reigns to win the WWE World Heavyweight Championship; however, Ambrose cashed in the Money in the Bank contract and defeated Rollins for the title.