Original: On her way to the city, Dorothy meets a Scarecrow (Ray Bolger) with no brain, a Tin Man (Jack Haley) with no heart, and a Cowardly Lion (Bert Lahr) (these are played by the same actors as the farm hands back in Kansas).
Simplified: On the way, she meets: The Scarecrow (Ray Bolger), who has no brain; the Tin Man (Jack Haley), who has no heart; the Cowardly Lion (Bert Lahr), who lacks courage.