Task: Question Generation
Input (English): Context : La jolie fille de Perth (The Fair Maid of Perth) is an opera in four acts by Georges Bizet (1838--1875), from a libretto by Jules-Henri Vernoy de Saint-Georges and Jules Adenis, after the novel by Sir Walter Scott. 
Answer : The Fair Maid of Perth
Output (English): The La jolie fille de Perth is based upon what?