Question: What American composer who won the National Medal of Arts in 2007, also taught American composer Gregg Wager?

full_context: Document 1: Walter Piston: Walter Hamor Piston Jr, (January 20, 1894 – November 12, 1976), was an American composer of classical music, music theorist, and professor of music at Harvard University. His students included Leroy Anderson, Leonard Bernstein, Elliott Carter, Irving Fine, and Robert Strassburg.
Document 2: Adam Schoenberg: Adam Schoenberg (born November 15, 1980) is one of the most performed living American composers. A member of the Atlanta School of Composers, his works have been performed by the Amarillo Symphony, Atlanta Symphony Orchestra, Buffalo Philharmonic Orchestra, Charleston Symphony Orchestra, Charlotte Symphony Orchestra, The Cleveland Orchestra, Dallas Symphony Orchestra, The Florida Orchestra, Fort Worth Symphony Orchestra, Grand Rapids Symphony, Jacksonville Symphony, Kansas City Symphony, Knoxville Symphony Orchestra, Lake Forest Symphony Orchestra, Lexington Philharmonic, Los Angeles Philharmonic, National Symphony Orchestra, New West Symphony, New World Symphony (orchestra), New York Philharmonic, Orlando Philharmonic Orchestra, Pacific Symphony, Phoenix Symphony, Rochester Philharmonic Orchestra, San Diego Symphony, South Carolina Philharmonic, Tallahassee Symphony Orchestra, Waterloo-Cedar Falls Symphony, among other ensembles. Schoenberg was the 2010-2012 guest composer for the Aspen Music Festival, the 2012-2013 composer-in-residence for the Kansas City Symphony, the 2013-2014 composer-in-residence for the Lexington Philharmonic, and the 2015-2017 composer-in-residence for the Fort Worth Symphony. Schoenberg's honors include a 2009 and 2010 MacDowell Colony fellowship, the 2007 Morton Gould Young Composer Award from ASCAP, and the 2006 Charles Ives Prize from the American Academy of Arts & Letters.
Document 3: Edna Golandsky: Edna Golandsky is a classical music pianist, lecturer and pedagogue of renown. She is a graduate of the Juilliard School, where she studied under Rosina Lhevinne and Adele Marcus. She later studied privately during many years with noted pedagogue Dorothy Taubman, whom she considers her main influence. She has earned wide acclaim throughout the United States and abroad for her extraordinary ability to solve technical problems at the instrument and for her penetrating musical insight. Many well-known concert pianists frequently play for her in her New York studio, including Chopin Competition laureate Gabriela Montero and Leeds Competition winner Ilya Itin. Golandsky co-founded the Taubman Institute, of which she was Associate Artistic Director from 1976-2002.
Document 4: Michael Wolters: Michael Wolters is a British composer of German origin. He was born in 1971 in Mönchengladbach, Germany, grew up in Niederkrüchten, a small German village on the Dutch border and now lives in Birmingham, UK. After working as a care worker in a children's home and a runner at several theatres in Germany and Scarborough he studied Applied Theatre Studies at Justus-Liebig-Universität Giessen, Germany and Composition and Theatre Studies at the University of Huddersfield (BA, MA) and finally received his PhD in Composition from the University of Birmingham in 2003. His composition teachers include Christopher Fox, Heiner Goebbels, Patric Standford and Vic Hoyland. Since 2009 he has been Deputy Head of Composition at Birmingham Conservatoire. He is a founder member of the artists' collective New Guide to Opera.
Document 5: Eric Whitacre: Eric Edward Whitacre (born January2, 1970) is a Grammy-winning American composer, conductor, and speaker, known for his choral, orchestral and wind ensemble music. He is also known for his "Virtual Choir" projects, bringing individual voices from around the globe together into an online choir. In March2016, he was appointed as Los Angeles Master Chorale's first artist-in-residence at the Walt Disney Concert Hall.
Document 6: Morten Lauridsen: Morten Johannes Lauridsen (born February 27, 1943) is an American composer. A National Medal of Arts recipient (2007), he was composer-in-residence of the Los Angeles Master Chorale (1994–2001) and has been a professor of composition at the University of Southern California Thornton School of Music for more than 40 years.
Document 7: Igor Štuhec: Igor Štuhec (born 15 December 1932) is a contemporary Slovenian composer, who lives in Ljubljana and Maribor. He studied composition at the Ljubljana Academy of Music under Lucijan Marija Škerjanc and Matija Bravničar. He continued his studies at the Vienna Academy of Music and Dramatic Art under Hanns Jelinek, and also at the Darmstädter Ferienkurse. After some early neo-classical orchestral works that show his mastery of traditional techniques, Štuhec gradually moved towards the adoption of new techniques in the early 1960s. Although in 1955 he had produced a musique concrète composition in "Biological Transformation", the radical change came with the chamber pieces "Situacija" (1963) and "Silhuete" (1964) and the orchestral "Differentiations" (1964), all of which exhibit his assimilation of 12-note and aleatory procedures. Štuhec's skill is particularly evident in miniatures such as the "Minikoncert", where his writing is at its most delicate and the textures are almost always crystal clear. A later group of orchestral works extending his textural techniques, notably the concertos and the three "Entuziazmi" pieces, display a vivid imagination and a strong rhythmic momentum. Also among his works are two operas, "Zupanova Micka" (1948) and
Document 8: Theodor W. Adorno: Theodor W. Adorno ( ; ] ; born Theodor Ludwig Wiesengrund; September 11, 1903 – August 6, 1969) was a German philosopher, sociologist, and composer known for his critical theory of society.
Document 9: La Monte Young: La Monte Thornton Young (born October 14, 1935) is an American avant-garde composer, musician, and artist generally recognized as the first minimalist composer. His works are cited as notable examples of post-war experimental and contemporary music, and were tied to New York's downtown music and Fluxus art scenes.
Document 10: Richard Carrick: Richard David Carrick (born 1971 in Paris, France) is an American composer, pianist and conductor. He was a Guggenheim Fellow in Music Composition for 2015-16 while living in Kigali, Rwanda. His compositions are influenced by diverse sources including traditional Korean Gugak music, the flow concept of Mihaly Csikszentmihalyi, Gnawa Music of Morocco, Jazz, experimental music, concepts of infinity, the works of Italo Calvino and Ludwig Wittgenstein, and his work as improviser
Document 11: James Matheson (composer): James Matheson (born 1970 in Des Moines, Iowa) is an American composer. His works have been commissioned and performed by the Albany Symphony Orchestra, Chicago Symphony Orchestra, Los Angeles Philharmonic, New York Philharmonic, Borromeo String Quartet, Carnegie Hall and the St. Lawrence String Quartet. In December 2011, he received the Charles Ives Living from the American Academy of Arts and Letters, an award providing him with $100,000 for two years (2012-2014). Previously, he received the Academy’s Goddard Lieberson Fellowship in 2008 and Hinrichsen Award in 2002. He has also received awards from the Civitella Ranieri, Bogliasco and Sage Foundations, ASCAP, and the Robbins Prize. He was executive director of the MATA Festival of New Music in New York from 2005-2007 and has been a fellow at the Aspen Music Festival. Since September 2009, he has been the director of the Los Angeles Philharmonic’s Composer Fellowship Program.
Document 12: Stephen Paulus: Stephen Paulus (August 24, 1949 – October 19, 2014) was a Grammy winning American composer, best known for his operas and choral music. His best-known piece is his 1982 opera "The Postman Always Rings Twice", one of several operas he composed for the Opera Theatre of St. Louis, which prompted "The New York Times" to call him "a young man on the road to big things". His style is essentially tonal, and melodic and romantic by nature. He received grants from the National Endowment for the Arts and Guggenheim Foundation and won the prestigious Kennedy Center Friedheim Prize. He was commissioned by such notable organizations as the Minnesota Opera, the Chamber Music Society of Lincoln Center, Opera Theatre of Saint Louis, the Saint Louis Chamber Chorus, the American Composers Orchestra, the Dale Warland Singers, the Harvard Glee Club and the New York Choral Society. Paulus was a passionate advocate for the works and careers of his colleagues. He co-founded the American Composers Forum in 1973, the largest composer service organization in the U.S., and served as the Symphony and Concert Representative on the ASCAP Board of Directors from 1990 until his death (from complications following a stroke in July 2013) in 2014.
Document 13: Gregg Wager: Gregg Wager (born September 16, 1958 in Adrian, Michigan) is an American composer, pianist, and music critic. He studied composition at the University of Southern California and the California Institute of the Arts. His teachers included Morton Subotnick and Morten Lauridsen. His piano teachers included Yuriy Oliynyk, Doris Stevenson, and Chester Swiatkowski. In 1996, he earned a Ph.D. in musicology at the Free University Berlin.
Document 14: William Bolcom: William Elden Bolcom (born May 26, 1938) is an American composer and pianist. He has received the Pulitzer Prize, the National Medal of Arts, a Grammy Award, the Detroit Music Award and was named 2007 Composer of the Year by Musical America. Bolcom taught composition at the University of Michigan from 1973–2008. He is married to mezzo-soprano Joan Morris.
Document 15: Gene Pritsker: Gene Pritsker (born 1971) is a Russian-born composer, guitarist, rapper and record producer living in New York City. He moved to the United States with his family in 1979 and lived in Sheapshead Bay Brooklyn. He attended the Manhattan School of Music from 1990 to 1994 where he studied composition with Giampaolo Bracali. While attending Manhattan School of Music he co-founded the Absolute Ensemble with Kristjan Järvi and formed Sound Liberation, which has released cd's on Col-legno, Composers Concordance Records and Innova Recordings. Gene's music has been performed by the Adelaide Symphony, MDR Symphony Orchestra, Athens Camarata, Brooklyn Philharmonic and the Berlin Philharmonic. He worked closely with the Austrian-American jazz keyboardist and composer Joe Zawinul and has orchestrated Hollywood movies.
ground_truth: Morten Lauridsen