Question: Edgar Evans had a famous role in the play composed by which Russian composer of the Romantic period?
Context: Modest Petrovich Mussorgsky (Russian: Моде́ст Петро́вич Му́соргский ; ] ; 21 March [O.S. 9 March] 1839 – 28 March [O.S. 16 March] 1881 ) was a Russian composer, one of the group known as "The Five".  He was an innovator of Russian music in the romantic period.  He strove to achieve a uniquely Russian musical identity, often in deliberate defiance of the established conventions of Western music. Evans Glacier is a tributary glacier just south of the Owen Hills, flowing east from the Queen Alexandra Range into Beardmore Glacier.  It was named by the New Zealand Geological Survey Antarctic Expedition (1961–62) for Petty Officer Edgar Evans, a member of Scott's South Pole Party of the British Antarctic Expedition, 1910–13, who died near here. Edgar Evans (9 June 191222 February 2007) was a Welsh opera singer.  His most famous role was Hermann in Tchaikovsky's "The Queen of Spades" at the Royal Opera House, Covent Garden. Evans Piedmont Glacier ( ) is a broad ice sheet occupying the low-lying coastal platform between Tripp Island and Cape Archer in Victoria Land.  It was circumnavigated in 1957 by the New Zealand Northern Survey Party]of the Commonwealth Trans-Antarctic Expedition, 1956–58, and was named after Petty Officer Edgar Evans, Royal Navy, of the British Antarctic Expedition, 1910–13, who was one of the South Pole Party under Captain Scott, and who lost his life on the Beardmore Glacier on the return journey. Pyotr Ilyich Tchaikovsky ( ; Russian: Пётр Ильи́ч Чайко́вский ; 25 April/7 May 1840 – 25 October/6 November 1893), often anglicized as Peter Ilich Tchaikovsky, was a Russian composer of the romantic period, some of whose works are among the most popular music in the classical repertoire.  He was the first Russian composer whose music made a lasting impression internationally, bolstered by his appearances as a guest conductor in Europe and the United States.  Tchaikovsky was honored in 1884, by Emperor Alexander III, and awarded a lifetime pension. Evans Névé ( ) is a large névé which nourishes Tucker Glacier, Mariner Glacier, Aviator Glacier, Rennick Glacier and Lillie Glacier in Victoria Land, Antarctica.  The névé was named in honor for Edgar Evans of the ill-fated British Antarctic Expedition, 1910–13, by the Northern Party of the New Zealand Geological Survey Antarctic Expedition, 1963–64.  Evans, along with Edward Adrian Wilson, Lawrence Oates and Henry Robertson Bowers, accompanied Captain Robert F. Scott to the Geographic South Pole, January 17, 1912.  All five perished on the return journey after failing to beat Norwegian explorer Roald Amundsen to the 90th parallel.  This glaciological feature lies situated on the Pennell Coast, a portion of Antarctica lying between Cape Williams and Cape Adare. Alexander Konstantinovich Glazunov (Russian: Алекса́ндр Константи́нович Глазуно́в , 10 August 1865 – 21 March 1936) was a Russian composer, music teacher, and conductor of the late Russian Romantic period.  He served as director of the Saint Petersburg Conservatory between 1905 and 1928 and was instrumental in the reorganization of the institute into the Petrograd Conservatory, then the Leningrad Conservatory, following the Bolshevik Revolution.  He continued heading the Conservatory until 1930, though he had left the Soviet Union in 1928 and did not return.  The best-known student under his tenure during the early Soviet years was Dmitri Shostakovich. Frank Edgar Evans (19 November 1876 – 25 November 1941) served as an infantryman in the Spanish–American War, and was commissioned in the United States Marine Corps on 15 February 1900. Alexander Yuryevich Radvilovich (Russian: Александр Юрьевич Радвилович ; born 1955) is a Russian composer, pianist and teacher from Leningrad (now Saint Petersburg) from which Conservatory he also graduated at which he was under guidance from Sergei Slonimsky.  In 1992 and 1994 respectively he was the first ever composer of Russian origin to get education at the International New Music in Darmstadt.  He is known for his symphonies of two of his own poems called "Legend About Violinist" and "Pushkin".  At one time, after reading Fyodor Dostoyevsky he composed a string quartet called "The Boy at Christ’s New Year Celebration" and also designed a mini opera called "Let’s Write Fairy-tale".  He also composed an opera called "Hindrance" which was based on Danii Kharms' poem "Ruin of the Gods".  Currently he is a member of both Russian Composer’s and Saint Petersburg Composer's Unions and works as music pedagogue at the Humanitarian University of the Petersburg Conservatory.  On occasion, he tours the world as composer, pianist and leader of the Sound Ways which he also founded back in 1989.  His music is published by various labels in countries such as Russia, the Netherlands and the United States. Petty Officer Edgar Evans (7 March 1876 – 17 February 1912) was a member of the "Polar Party" in Robert Falcon Scott's ill-fated Terra Nova Expedition to the South Pole in 1911–1912.  This group of five men, personally selected for the final expedition push, attained the Pole on 17 January 1912.  The party perished as they attempted to return to the base camp.
Answer: Pyotr Ilyich Tchaikovsky