Complex sentence: At Hell in a Cell, The Wyatt Family attacked The Undertaker after he lost to Brock Lesnar in a Hell in a Cell match and carried his body out of the arena.
Split into simpler sentences: At Hell in a Cell, Brock Lesnar defeated The Undertaker in a Hell in a Cell match. After the match, The Wyatt Family came to the ring and attacked The Undertaker, and then carried his body out of the arena.