Complex sentence: In the modern era, Robert Crane is still alive and now a doctor, and he helps the government revive G.I. Robot to join the soldiers to eliminate Frankenstein and the Creatures of the Unknown after they escape from the lab facility.
Split into simpler sentences: In the modern era, Robert Crane is still alive and now a doctor. He also helps the government revive G.I. Robot to join the soldiers to eliminate Frankenstein and the Creatures of the Unknown after they have escaped from the lab facility.