What nationality was the composer who wrote 'The First Piano Sonata in 1946'?
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.
Marcel Sulzberger Johann Heinrich Samuel "Marcel" Sulzberger (1876–1941) was a Swiss composer, pianist and music author.