A symphony of Three Orchestras was dedicated to someone who died in what year?
Pierre Boulez Pierre Louis Joseph Boulez CBE (] ; 26 March 1925 – 5 January 2016) was a French composer, conductor, writer and organiser of institutions. He was one of the dominant figures of the post-war classical music world.
Joly Braga Santos José Manuel Joly Braga Santos, (] ; May 14, 1924July 18, 1988) was a Portuguese composer and conductor, who was born and died in Lisbon. He wrote six symphonies.