"Giuseppe Verdi's 200th birthday is being observed by San Francisco Opera on Friday with a huge and historic performance of his choral masterpiece ""Messa de Requiem.""  Nicola Luisotti, Music Director of both the San Francisco Opera and Italy's Teatro di San Carlo of Naples will conduct 320 singers and musicians from both companies on stage at War Memorial Opera House with vocal soloists Leah Crocetto, Margaret Mezzacappa, Michael Fabiano and Vitalij Kowaljow.  Photo: Hulton Archive/Getty Images)"
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