Question: Knoxville: Summer of 1915 is a work for voice and orchestra by what American composer of orchestral, opera, choral, and piano music, who is one of the most celebrated composers of the 20th century?
{'answer': 'Samuel Osborne Barber II', 'supporting_facts': [['Knoxville: Summer of 1915', 0], ['Knoxville: Summer of 1915', 1], ['Samuel Barber', 0], ['Samuel Barber', 1]]}