Complex sentence: They live in a world that involves many living monster trucks.Their friends include the trucks Starla, Stripes, Zeg, and Darington, as well as a girl named Gabby, who is a mechanic who can fix anything.
Split into simpler sentences: They live in a world that involves many living monster trucks, including their truck friends Starla, Stripes, Zeg, and Darington. Another friend of theirs is a girl named Gabby, who is a mechanic who can fix anything.