Question: Who was a lead composer for the "bel canto" opera style, Gustave Charpentier or Gaetano Donizetti?
{'answer': 'Donizetti was a leading composer of the "bel canto" opera style during the first half of the nineteenth century.', 'supporting_facts': [['Gustave Charpentier', 0], ['Gaetano Donizetti', 1]]}