Complex sentence: The King and Queen of Marināsa decide to escape from the Earth, but Momo elects to stay behind in order to fulfill her parents' dream of having a child, believing that hopes and dreams are never really lost.
Split into simpler sentences: The King and Queen of Marināsa decide to escape from the Earth. Momo stays behind to fulfill her parents' dream of having a child, believing that hopes and dreams are never really lost.