Complex sentence: "Who's on First?" is descended from turn-of-the-century burlesque sketches like "The Baker Scene" (the shop is located on Watt Street) and "Who Dyed" (the owner is named Who).
Split into simpler sentences: Who's on First? is descended from turn-of-the-century burlesque sketches that used plays on words and names. Examples are "The Baker Scene"(the shop is located on Watt Street) and "Who Dyed" (the owner is named Who).