Complex sentence: Cyclops accompanies Professor X to visit Magneto, who is locked in a plastic prison cell and while waiting for Xavier outside, Cyclops is attacked by Yuriko Oyama and the cell guards.
Split into simpler sentences: Cyclops accompanies Professor X to visit Magneto, who is locked in a plastic prison cell. While waiting for Xavier outside, Cyclops is attacked by Yuriko Oyama and the cell guards.