Complex sentence: Realizing the extent of Lennon's injuries, the policemen decided not to wait for an ambulance, immediately carried him into their squad car, and rushed him to St. Luke's-Roosevelt Hospital Center.
Split into simpler sentences: Realizing the extent of Lennon's injuries, the policemen decided not to wait for an ambulance and immediately carried Lennon into their squad car. He was rushed to St. Luke's-Roosevelt Hospital Center.