claim: Eugenio Cavallini conducted the world premiere of Gaetano Donizetti's opera. This opera and an opera featuring a Tenore di grazia were two act operas, the latter being based on a three-act melodrame.
supporting_facts.key: Lucrezia Borgia (opera)
supporting_facts.key: Il pirata
supporting_facts.key: Eugenio Cavallini
supporting_facts.key: Tenore di grazia