Question: What is the nationality of the composer of the opera The Twelve Charis?

Context articles: Dmitri Shostakovich
March 2016 Istanbul bombing
The Twelve Days of Christmas (song)
65th British Academy Film Awards
National Opera Studio
James Westman
Anna von Mildenburg
The Twelve Chairs (Shostakovich)
Hymn of Veria (My Queen)
Viola Concerto (Walton)

Dmitri Dmitriyevich Shostakovich (Russian: Dmitriy Dmitrievich Shostakovich , ] ; 25 September [O.S. 12 September] 1906 9 August 1975) was a Russian composer and pianist.
 He is regarded as one of the major composers of the 20th century.
On 19 March 2016, a suicide bombing took place in Istanbul's Beyoğlu district in front of the district governor's office.
 The attack occurred at 10:55 (EET) at the intersection of Balo Street with İstiklal Avenue, a central shopping street.
 The attack caused at least five deaths, including that of the perpetrator.
 Thirty-six people were injured, including seven whose injuries were severe.
 Among those injured were twelve foreign tourists.
 Among those killed, two were of dual Israel-US nationality.
 On 22 March, the Turkish interior minister said that the bomber had links with ISIL.
"The Twelve Days of Christmas" (Roud 68) is an English Christmas carol that enumerates in the manner of a cumulative song a series of increasingly grand gifts given on each of the twelve days of Christmas (the twelve days that comprise the Christmas season starting with Christmas Day).
 The song, published in England in 1780 without music as a chant or rhyme, is thought to be French in origin.
 "The Twelve Days of Christmas" has a Roud Folk Song Index number of 68.
 The tunes of collected versions vary.
 The standard tune now associated with it is derived from a 1909 arrangement of a traditional folk melody by English composer Frederic Austin, who first introduced the now familiar prolongation of the verse "five gold rings".
The 65th British Academy Film Awards, more commonly known as the BAFTAs, were held on 12 February 2012 at the Royal Opera House in London, honouring the best national and foreign films of 2011.
 The nominations were announced on 17 January 2012 by actor Daniel Radcliffe and actress Holliday Grainger.
 Presented by the British Academy of Film and Television Arts, accolades are handed out for the best feature-length film and documentaries of any nationality that were screened at British cinemas in 2011.
 Stephen Fry, who hosted from 2001 to 2006, returned to host the ceremony. "
The Artist" won seven awards out of its twelve nominations, including Best Film, Best Director for Michel Hazanavicius, and Best Actor for Jean Dujardin.
 Meryl Streep won Best Actress for "The Iron Lady".
 Christopher Plummer won Best Supporting Actor for "Beginners" and Octavia Spencer won Best Supporting Actress for "The Help". "
Tinker Tailor Soldier Spy", directed by Tomas Alfredson, was voted Outstanding British Film of 2011.
 Director Martin Scorsese was given the BAFTA Fellowship and Sir John Hurt garnered the BAFTA Outstanding British Contribution to Cinema Award.
The National Opera Studio in London, England was established in 1977 by the Arts Council as a link between the music colleges and the six main UK opera companies.
 It was resident at Morley College in Lambeth until 2003, when it gained use for the first time of its own dedicated premises in Chapel Yard, Wandsworth.
 Its director is the soprano Kathryn Harries, who succeeded Donald Maxwell at the start of 2009, and its Head of Music is Mark Shanahan.
 It is responsible for the training of approximately twelve singers each academic year, as well as three piano répétiteurs.
 Its funding comes in part from the six main UK opera companies – Royal Opera House, English National Opera, Welsh National Opera, Scottish Opera, Opera North and the Glyndebourne Festival Opera.
 Representatives from each company sit on the final audition panel for selection of each year's intake.
 The nine-month course usually includes residencies at three of the national opera companies, as well as opera scenes performances in London throughout the year.
James Westman (born September 16, 1972) is a Canadian baritone known for his interpretation of the Verdi, Puccini and bel canto operatic repertoire, and particularly his signature role of Germont in "La traviata", which he has sung in over 150 performances, with opera companies such as San Francisco Opera, Houston Grand Opera, Pittsburgh Opera, Florida Grand Opera, Graz Opera, Santa Fe Opera, Chicago Lyric Opera, Opéra de Montréal, Los Angeles Opera, Grand Théâtre de Bordeaux, Canadian Opera Company, Boston Lyric Opera, Cologne Opera, Vancouver Opera, English National Opera, San Diego Opera, Dallas Opera, Utah Opera, and Opera Theatre of St. Louis.
 On January 29, 2011 Westman created the lead role of Sandy Keith In the world premiere of Bramwell Tovey's The Inventor.
 In 2017 he played Sir John A. MacDonald in Harry Somers's Louis Riel for the Canadian Opera Company's tribute to Canada's 150th celebrations.
 As a recitalist, he has performed for the Marilyn Horne Foundation, Aldeburgh Connection, Aldeburgh Festival, Musikverein, Wigmore Hall, Queen Elizabeth Hall, Morgan Library & Museum, Koerner Hall, Carnegie Hall, Saito Kinen Festival in Japan, Stratford Summer Music, British Broadcasting Corporation, and the Canadian Broadcasting Corporation.
 Westman first came to attention at the age of twelve when he was the first boy soprano to perform and record Mahler "4th Symphony" with Benjamin Zander and the Boston Philharmonic Orchestra in 1984.
 Westman is regularly featured as the Anthem singer for the Toronto Maple Leafs and numerous other NHL franchises.
 Four of Westman's recordings have been nominated for a Juno Award.
 Two recordings nominated for a Grammy Award.
Anna von Mildenburg (November 29, 1872 – January 27, 1947) was an eminent Wagnerian soprano of Austrian nationality.
 Known as Anna Bahr-Mildenburg after her 1909 marriage, she had been a protégé of the composer/conductor Gustav Mahler during his musical directorship at the Hamburg State Opera.
 In 1898, Mahler took her to the Vienna Opera, where she established herself as one of the great stars during his celebrated tenure there as music director.
The Twelve Chairs (Russian: Двенадцать стульев , "Dvenadtsat stulyev") is an unfinished operetta by Dmitri Shostakovich based on the classic story of the same name, by Ilf and Petrov.
 Shostakovich announced the work in July 1939, for the Leningrad Theater of Musical Comedy.
 In October that year, he assumed he'd be finished with the operetta at the end of that year, but he never finished the work.
The Hymn of Veria or Vasilissa mou ("My Queen") is the anthem of the Greek football club Veria F.C., based in Veria.
 The lyrics were written in 2014 by the Greek songwriter Nektarios Mpirtos, who was also the composer.
 Charis Akritidis was the first to perform the anthem.
The Viola Concerto by William Walton was written in 1929 for the violist Lionel Tertis at the suggestion of Sir Thomas Beecham.
 The concerto carries the dedication "To Christabel" (Christabel McLaren, Lady Aberconway).
 But Tertis rejected the manuscript, and composer and violist Paul Hindemith gave the first performance.
 The work was greeted with enthusiasm.
 It brought Walton to the forefront of British classical music.
 In "The Manchester Guardian", Eric Blom wrote, "This young composer is a born genius" and said that it was tempting to call the concerto the best thing in recent music of any nationality.
 Tertis soon changed his mind and took the work up.