Complex sentence: Celebrities including Tony Bennett, Lena Horne, Dorothy Lewis, Frank Sinatra, and Luciano Pavarotti have also been guests, and Elizabeth Taylor and Richard Burton chose the Copley Plaza for their second honeymoon.
Split into simpler sentences: Celebrities including Tony Bennett, Lena Horne, Dorothy Lewis, Frank Sinatra, and Luciano Pavarotti have also been guests. In addition, Elizabeth Taylor and Richard Burton chose the Copley Plaza for their second honeymoon.