Complex sentence: A Roman centurion who had died in battle is resurrected from the dead by Zeus, who ordered the warrior to save his daughter, Athena, from a Demon God called Neff in the Underworld.
Split into simpler sentences: A Roman centurion who had died in battle is resurrected from the dead by Zeus. The centurion is ordered by Zeus to save his daughter Athena from a Demon God called Neff in the Underworld.