Question: Both Gaetano Donizetti and Luigi Cherubini were regarded as Beethovens greatest contemporaries?
Sentence (from "Il furioso all'isola di San Domingo"): However, as has been noted by Charles Osborne, the "ultimate derivation of both play and libretto is an episode in part 1 of "Don Quixote" by Miguel de Cervantes's published in 1605" which is the story of Cardenio and Lucinda.
Relevant evidence: No