Question: Estonian Philharmonic Chamber Choir won the grammy Award for Best Choral Performance for two songs by a composer born in what year ?

Context articles: Michigan State University Children's Choir
Dresden Philharmonic
Michael Ostrzyga
Chamber Choir Head Ööd, Vend
Grex Vocalis
Paul Spicer (musician)
Te Deum (Pärt)
Estonian Philharmonic Chamber Choir
William Dehning
Arvo Pärt

The Michigan State University Children's Choir (MSUCC) is a Grammy Award-winning children's choir located in East Lansing, Michigan.
 In 2009, Kristin Zaryski was named director, succeeding the founder of the choir, Mary Alice Stollak.
 Following Ms. Zaryski, Kyle Zeuch was named Director.
 Most choristers in the choir come from the two other children's choirs in the program, the CMS Singers, and Preparatory Choir.
 The choir has performed at Carnegie Hall in New York City, Orchestra Hall in Detroit, Symphony Center in Chicago, and the Kennedy Center, in Washington D.C. In 2006, the choir won two Grammy Awards for their contributions to William Bolcom's "Songs of Innocence and of Experience": Best Choral Performance and Best Classical Album .
The Dresdner Philharmonie (unofficial English translation: Dresden Philharmonic) is a German symphony orchestra based in Dresden.
 Its principal concert venue is the "Kulturpalast".
 The orchestra also performs at the "Kreuzkirche", the Hochschule für Musik Dresden, and the Schloss Albrechtsberg.
 It receives financial support from the city of Dresden.
 The choral ensembles affiliated with the orchestra are the Dresden Philharmonic Choir and Dresden Philharmonic Chamber Choir.
Michael Ostrzyga is a German Composer and Conductor based in Cologne.
 He is known for his choral music in particular, being commissioned by festivals like the Schleswig-Holstein Musik Festival and performers like The Chamber Choir of Asia, the Finnish YL Male Voice Choir (Ylioppilaskunnan Laulajat), the Vienna Chamber Choir, Latvian Youth Choir "Kamēr..." and Chamber Choir Consono, among others.
 His works are performed by ensembles like the Raschèr Saxophone Quartet, New Dublin Voices, the Australian Chamber Choir, Rheinisches Klavierduo, Swedish choirs Kammarkören Pro Musica and Allmänna Sången Neues Rheinisches Kammerorchester, The Choral Project (California) and SFA A Cappella Choir (Texas).
Chamber Choir Head Ööd, Vend is an Estonian chamber choir.
 The chief conductor of the choir is the Estonian composer Pärt Uusberg.
Grex Vocalis (The Singing Band) is a Norwegian chamber choir, formed in 1971 by Carl Høgset, who remains its conductor.
 The repertoire spans from the renaissance to music by contemporary composers.
 The choir has been awarded the Norwegian Spellemannprisen prize (the Norwegian equivalent to a Grammy Award) for three of its thirteen albums (in 1977, 1983, and 2006) and has won first prizes in national and international contests (Arezzo, Gorizia, Tolosa and the International Chamber Choir Competition Marktoberdorf).
 In 1999 Grex Vocalis was awarded "Il Gran Premio Città di Arezzo" as the overall best choir in that year's contest.
 Grex Vocalis is primarily an a cappella choir, comprising ca. 35 singers, but performs on occasion also with soloists and orchestras.
 They have toured extensively in Europe, and also given a series of concerts in Japan and Cuba.
Paul Spicer (born 6 June 1952) is an English composer, conductor, and organist.
 He taught choral conducting at the Royal College of Music and conducted the RCM Chamber Choir between 1995 and 2008.
 He currently teaches conducting at the Birmingham Conservatoire and conducts their chamber choir which records for Somm Records.
 He also teaches at Oxford and Durham universities.
 Since 2004 he has been the conductor of the Petersfield Festival.
 He was Senior Producer for BBC Radio 3 for the Midlands Region based in Birmingham between 1984 and 1990 after which he moved to be Artistic Director of the Lichfield Festival.
 He also produced for various record companies over many years.
 He founded the Finzi Singers in 1984 making many recordings for Chandos Records.
 He conducts the Birmingham Bach Choir and the Whitehall Choir in London.
 His compositions include two oratorios for Easter and for Advent with libretti by the Dr Tom Wright and a choral symphony 'Unfinished Remembering' (2014) to a libretto by Euan Tait commemorating the outbreak of World War 1.
 He runs a series of choral courses under the banner of The English Choral Experience based mainly at Abbey Dore in Herefordshire.
Te Deum is a setting of the Latin Te Deum text, also known as the Ambrosian Hymn attributed to Saints Ambrose, Augustine, and Hilary, by Estonian-born composer Arvo Pärt, commissioned by the Westdeutscher Rundfunk in Cologne, Germany, in 1984.
 Dedicated to the late Alfred Schlee of Universal Edition, the WDR Broadcast Choir premiered the Te Deum under the direction of conductor Dennis Russell Davies on January 19, 1985.
 The Te Deum plays an important role in the services of many Christian denominations, including the Paraklesis (Moleben) of Thanksgiving in the Eastern Orthodox Church.
 Because of the unusual instrumentation Pärt employs, his Te Deum is not suited for use within the Orthodox Church.
 It was recorded on the ECM New Series label in 1993 by the Estonian Philharmonic Chamber Choir and Tallinn Chamber Orchestra under the direction of Tõnu Kaljuste.
 The piece is approximately thirty minutes long.
The Estonian Philharmonic Chamber Choir (EPCC) is a professional choir based in Estonia.
 It was founded in 1981 by Tõnu Kaljuste, who was its conductor for twenty years.
 In 2001, Paul Hillier followed Kaljuste's tenure, becoming the EPCC's principal conductor and artistic director until September 2008, when Daniel Reuss took over the task.
 The repertoire of the EPCC ranges from Gregorian Chant to modern works, particularly those of the Estonian composers Arvo Pärt and Veljo Tormis.
 The group has been nominated for numerous Grammy Awards, and has won the Grammy Award for Best Choral Performance twice: in 2007 with Arvo Pärt's "Da pacem" and in 2014 with Pärt's "Adam's Lament", the latter was shared with Tui Hirv & Rainer Vilu, Sinfonietta Riga & Tallinn Chamber Orchestra; Latvian Radio Choir & Vox Clamantis.
Dr. William John Dehning (August 13, 1942 - June 23, 2017) was an American conductor, teacher, and author who spent almost his entire career in the collegiate realm.
 He was known primarily for his work as conductor of the University of Southern California Thornton Chamber Choir and as author of the book, "Chorus Confidential: Decoding the Secrets of the Choral Art", published in 2003.
 Under his leadership, the Thornton Chamber Choir won seven prizes in international European competitions, including Grand Prizes in Varna, Bulgaria and Tours, France.
 After winning the choral competition with the USC Chamber Choir in Bulgaria, Dehning was awarded the Judges' Conducting Prize by a panel of ten judges in 1999.
 During his tenure, the ensemble also appeared at American Choral Directors Association (ACDA) conventions six times, including nationals in 2001 and 2005.
 They also completed a tour of East Asia in 2006, performing at the National Concert Hall in Taipei.
 While at Northern Michigan University from 1970–1972, Dehning was the founder of the Marquette Choral Society, which is still active.
 Later, he was from 1985-1995 the founder/conductor of the California Choral Company, a semi-professional chamber chorus that attained a reputation in Europe as well as in the United States.
 As Chairman of the USC Department of Choral Music (now retired), Dehning was awarded the first annual Dean’s Faculty Award for Excellence in Teaching, and he was also the 2007 recipient of the Thornton School's Ramo Award.
 Dehning was one of four founding members of the National Collegiate Choral Organization (NCCO), which held its first national conference in San Antonio in 2006.
Arvo Pärt (] ; born 11 September 1935) is an Estonian composer of classical and religious music.
 Since the late 1970s, Pärt has worked in a minimalist style that employs his self-invented compositional technique, tintinnabuli.
 Pärt's music is in part inspired by Gregorian chant.
 His most performed works include "Fratres" (1977), "Spiegel im Spiegel" (1978), and "Für Alina" (1976).
 Pärt has been the most performed living composer in the world for five consecutive years.