Complex sentence: His reanimated corpse begins banging on the door, as Peter and Anne listen to a radio report that the New York Harbor incident has escalated into an epidemic: as zombies advance on the Brooklyn Bridge, the entire city is under attack.
Split into simpler sentences: His reanimated corpse begins banging on the door, as Peter and Anne listen to a radio report that the New York harbour incident has escalated into a epidemic. As zombies advance on Brooklyn Bridge, the entire city is under attack.