Complex sentence: Marlena and Jacob leave, taking with them circus animals including Rosie, Queenie and Marlena's horses, and begin their life together by joining the Ringling Bros circus, and later Jacob becomes the chief veterinarian at the Brookfield Zoo in Chicago where they settled.
Split into simpler sentences: Marlena and Jacob leave, taking with them circus animals including Rosie, Queenie and Marlena's horses, and begin their life together by joining the Ringling Bros circus. Later, Jacob becomes the chief veterinarian at the Brookfield Zoo in Chicago where they settled.