Rebecca Reyher wrote (and copyrighted) a children’s book entitled My Mother Is the Most Beautiful Woman in the World. The story was based on a Russian folktale told to her by her own mother. Years later, the children’s TV show Sesame Street televised a skit entitled “The Most Beautiful Woman in the World.” The Sesame Street version took place in a different locale and had fewer frills, but the sequence of events in both stories was identical. The author of the Sesame Street script denied he had ever seen Reyher’s book but said his skit was based on a story told to his sister some 20 years before. Has Sesame Street infringed Reyher’s copyright?