Complex sentence: The next day, before the crack of dusk, Anna and Ethan discover that her theory is right as they arrive at the survivors' camp in Vermont where they are entered by some the military officers and Anna hands the cure to one of them.
Split into simpler sentences: The next day, before the crack of dusk, Anna and Ethan discover that her theory is right as they arrive at the survivors' camp in Vermont. They are greeted by some military officers and Anna hands the cure to one of them.