Complex sentence: The two of them discover the yellow brick road and happily begin to follow it together; the Scarecrow hoping the Wizard might be able to give him the one thing he feels that he lacks--a brain.
Split into simpler sentences: The two of them discover the yellow brick road and happily begin to follow it together. The Scarecrow hopes the Wizard might be able to give him the one thing he feels that he lacks--a brain.