Question: Viola Concerto was commissioned with contributions from the general interest family magazine founded in what year?

Context paragraphs:
Viola Concerto (Harbison): The Concerto for Viola and Orchestra is a viola concerto by the American composer John Harbison.  The work was commissioned by the Saint Paul Chamber Orchestra, the Los Angeles Chamber Orchestra, and the New Jersey Symphony Orchestra with contributions from Meet The Composer and "Reader's Digest".  It was first performed by Jaime Laredo and the New Jersey Symphony Orchestra under the direction of Hugh Wolff on May 18, 1990.

Cello Concerto No. 3 (Thomas): The Cello Concerto No. 3, Legend of the Phoenix, is a composition for cello solo and orchestra by the American composer Augusta Read Thomas.  The work was commissioned by the Boston Symphony Orchestra with contributions from Bill and Solange Brown.  It was first performed in Boston on March 14, 2013, by the cellist Lynn Harrell and the Boston Symphony Orchestra under the conductor Christoph Eschenbach.  Thomas subsequently adapted the piece into a viola concerto in 2013.

Der Schwanendreher: Paul Hindemith's Der Schwanendreher (literally, "The Swan turner") is a concerto for viola and orchestra.  "Der Schwanendreher" occupies a place at the core of the viola concerto repertoire, along with the concertos by Walton and Bartók.  It was composed in 1935 and premiered by the composer himself at a performance in Amsterdam on 14 November 1935.  Each movement is based on a separate medieval German folk song, thus, it is sometimes referred to as the "Concerto from Old Folk Songs".  This composition draws its title from the final movement's folk song base, "Aren't you the swan turner?" .

Viola Concerto (MacMillan): The Viola Concerto is a composition for viola and orchestra by the Scottish composer James MacMillan.  The work was jointly commissioned by the London Philharmonic Orchestra, the Lucerne Symphony Orchestra, the Bergen Philharmonic Orchestra, and the Adelaide Symphony Orchestra.  Its world premiere was given by the violist Lawrence Power and the London Philharmonic Orchestra under the direction of Vladimir Jurowski in the Royal Festival Hall, London, on 15 January 2014.  The piece is dedicated to Lawrence Power.

Viola Concerto (Bartók): The Viola Concerto, Sz.  120, BB 128 (also known as Concerto for Viola and Orchestra) was one of the last pieces written by Béla Bartók.  He began composing his viola concerto while living in Saranac Lake, New York, in July 1945.  The piece was commissioned by William Primrose, a respected violist who knew that Bartók could provide a challenging piece for him to perform.  He said that Bartók should not "feel in any way proscribed by the apparent technical limitations of the instrument"; Bartók, though, was suffering from the terminal stages of leukemia when he began writing the viola concerto and left only sketches at the time of his death.

Reader's Digest: Reader's Digest is an American general-interest family magazine, published ten times a year.  Formerly based in Chappaqua, New York, it is now headquartered in Midtown Manhattan.  The magazine was founded in 1920, by DeWitt Wallace and Lila Bell Wallace.  For many years, "Reader's Digest" was the best-selling consumer magazine in the United States; it lost the distinction in 2009 to "Better Homes and Gardens".  According to Mediamark Research (2006), "Reader's Digest" reaches more readers with household incomes of $100,000+ than "Fortune", "The Wall Street Journal", "Business Week", and "Inc." combined.

Viola Concerto (Muhly): The Viola Concerto is a composition for solo viola and orchestra by the American composer Nico Muhly.  Composed in 2014, the work was jointly commissioned by the Orquesta Nacionales de España, the Detroit Symphony Orchestra, Festival de Saint Denis, and the National Arts Centre Orchestra.  It was first performed on February 6, 2015 by the violist Nadia Sirota and the Orquesta Nacionales de España under the conductor Nicholas Collon.  The piece was later given its United States premiere on October 23, 2015, by Sirota and the Detroit Symphony Orchestra under Leonard Slatkin.

Viola concerto: A viola concerto is a concerto contrasting a viola with another body of musical instruments such as an orchestra or chamber music ensemble.  Early examples of viola concertos include Telemann's concerto in G major and several concertos by Carl Stamitz and other members of his family.  The first concertante work to use the viola without caution was Mozart's violin and viola Sinfonia Concertante.

Huisgenoot: Huisgenoot (Afrikaans for "House Companion") is a weekly Afrikaans-language general interest family magazine.  It has the highest circulation figures of any South African magazine and is followed by sister magazine "YOU", its English-language version.  A third magazine, "Drum", is directed at the black market.  The magazines have a combined circulation of about 550 000 copies a week.  Henriëtte Loubser is the current editor of "Huisgenoot".

Viola Concerto (Higdon): The Viola Concerto is a concerto for viola and orchestra in three movements by the American composer Jennifer Higdon.  The work was jointly commissioned by the Library of Congress, the Nashville Symphony, the Curtis Institute of Music, and the Aspen Music Festival.  It was premiered March 7, 2015 at the Thomas Jefferson Building in Washington, D.C., with conductor Robert Spano leading violist Roberto Díaz and the Curtis Chamber Orchestra.

Supporting paragraphs: Viola Concerto (Harbison) Reader's Digest
Answer: 1920