Complex sentence: When they stop to rest briefly on top of the Chrysler building, Dionysus snares Percy and Blackjack in grapevines, but the god decided to let him go after telling him a story about a betrayed girl whom the god marries.
Split into simpler sentences: When they stop to rest briefly on top of the Chrysler building, Dionysus snares Percy and Blackjack in grape vines. But the god decided to let him go after telling him a story about a betrayed girl who the god marries.