Complex sentence: While Steel reluctantly executes Miller, Sarah quickly amputates Miguel's arm and cauterizes the wound in an effort to stop zombification and she, Billy, and John fend off the soldiers who arrive to kill him.
Split into simpler sentences: While Steel reluctantly executes Miller, Sarah quickly amputates Miguel's arm and cauterizes the wound in an effort to stop zombification. She, Bill, and John fend off the soldiers who arrive to kill him.