Complex sentence: At the Chicago World's Fair of 1933-34, Sinclair sponsored a dinosaur exhibit meant to point out the correlation between the formation of petroleum deposits and the Age of Dinosaurs, and included a two-ton animated model of a brontosaur.
Split into simpler sentences: At the Chicago World's Fair of 1933-34, Sinclair sponsored a dinosaur exhibit meant to point out the correlation between the formation of petroleum deposits and the Age of Dinosaurs. The exhibit included a two-ton animated model of a brontosaur.