Question: George Rochberg's Symphony No. 5 was first performed in 1986 under the direction of what Hungarian-born orchestral and operatic conductor?
Context: Stephen Jaffe (born December 30, 1954 in Washington, D.C.) is an American composer of contemporary classical music.  He lives in Durham, North Carolina, United States, and serves on the music faculty of Duke University, where he holds the post of Mary and James H. Semans Professor of Music Composition; his colleagues there include composers Scott Lindroth and Anthony Kelley.  Jaffe graduated summa cum laude from the University of Pennsylvania in 1977; he received a master's degree the following year from the same institution.  During his time in Pennsylvania, he studied with George Crumb, George Rochberg, and Richard Wernick. István Kertész (28 August 192916 April 1973) was an internationally acclaimed Jewish Hungarian orchestral and operatic conductor who, throughout his brief but distinguished career led many of the world's great orchestras, including the Cleveland, Chicago, Philadelphia, New York, Los Angeles, Pittsburgh, Detroit, San Francisco and Minnesota Orchestras in the United States, as well as the London Symphony, Vienna Philharmonic, Berlin Philharmonic, Royal Concertgebouw Orchestra, Israel Philharmonic, and L'Orchestre de la Suisse Romande.  His orchestral repertoire numbered over 450 works from all periods, and was matched by a repertoire of some sixty operas ranging from Mozart, Verdi, Puccini and Wagner to the more contemporary Prokofiev, Bartók, Britten, Kodály, Poulenc and Janáček.  Kertész was part of a rich musical tradition that produced fellow Hungarian conductors Fritz Reiner, Antal Doráti, János Ferencsik, Eugene Ormandy, George Szell, János Fürst, Ferenc Fricsay, and Sir Georg Solti. C. William Harwood (March 14, 1948, Richmond, Virginia - April 26, 1984, Little Rock, Arkansas) was an American conductor.  Chiefly remembered for his work as an opera conductor, he notably conducted the Houston Grand Opera's groundbreaking 1977 national tour of George Gershwin's "Porgy and Bess".  He also conducted the world premieres of operas by Claude Debussy, Frederick Delius, Stephen Paulus, and George Rochberg. George Rochberg (July 5, 1918May 29, 2005) was an American composer of contemporary classical music.  Long a serial composer, Rochberg abandoned the practice following the death of his teenage son in 1964; he claimed this compositional technique had proved inadequate to express his grief and had found it empty of expressive intent.  By the 1970s, Rochberg's use of tonal passages in his music had invoked controversy among critics and fellow composers.  A teacher at the University of Pennsylvania until 1983, Rochberg also served as chairman of its music department until 1968 and was named the first Annenberg Professor of the Humanities in 1978.  For notable students See: . Balázs Kocsár is a Hungarian orchestral and operatic conductor.  He was born in 1963 in Budapest.  His father Miklós Kocsár is a composer awarded the Kossuth Prize.  He studied composition at Béla Bartók Vocational School of Music (Bartók Béla Zeneművészeti Szakközépiskola).  Then he entered the prestigious Franz Liszt Academy of Music to study choir conducting under István Párkai which was followed by studies in orchestral conducting under the guidance of Ervin Lukács.  He graduated with distinction in 1991.  His studies were continued at Universität für Musik und darstellende Kunst Wien under Professor Karl Österreicher.  He also participated in master classes led by Helmuth Rilling, Jorma Panula, Moshe Atzmon and Péter Eötvös. Pierre Dervaux (born 3 January 1917 in Juvisy-sur-Orge, France; died 20 February 1992 in Marseilles, France) was a French operatic conductor, composer, and pedagogue.  At the Conservatoire de Paris, he studied counterpoint and harmony with Marcel Samuel-Rousseau and Jean and Noël Gallon, as well as piano with Isidor Philipp, Armand Ferté, and Yves Nat.  He also served as principal conductor of the Opéra-Comique (1947–53), and the Opéra de Paris (1956–72).  In this capacity he directed the French première of Poulenc’s "Dialogues des Carmélites".  He was also Vice-President of the Concerts Pasdeloup (1949–55), President and Chief conductor of the Concerts Colonne (1958–92), Musical Director of the Orchestre des Pays de Loire (1971–79) as well as holding similar posts at the Quebec Symphony Orchestra (1968–75), where he collaborated with concertmaster Hidetaro Suzuki, and the Nice Philharmonic (1979–82). The Symphony No. 5 is the fifth symphony by the American composer George Rochberg.  It was commissioned by the Chicago Symphony Orchestra, which first performed the piece under the direction of Georg Solti on March 13, 1986.  The symphony has a duration of approximately 28 minutes and is cast a single continuous movement.  It was a finalist for the 1986 Pulitzer Prize for Music. Victor Kolar (February 12, 1888 – June 16, 1957) was a Hungarian-born American composer and conductor.  Kolar was born in Budapest and studied at the Prague Conservatory, where he was a pupil of Otakar Ševčík (violin) and Antonín Dvořák (composition).  From 1905 until 1920 he was a violinist with the Pittsburgh Symphony and New York Symphony, joining the Detroit Symphony in 1920 as an assistant conductor.  He remained with the orchestra until 1941, eventually assuming the post of principal conductor.  Active as a composer as well, he wrote a symphony, some tone poems and a few orchestral suites. Of these last, his "Americana" won first prize in a 1914 contest sponsored by the Illinois State Teachers Association. Sir Georg Solti, KBE ( ; Budapest, 21 October 1912Antibes, 5 September 1997) was a Hungarian-born orchestral and operatic conductor, best known for his appearances with opera companies in Munich, Frankfurt and London, and as a long-serving music director of the Chicago Symphony Orchestra.  Born in Budapest, he studied there with Béla Bartók, Leó Weiner and Ernő Dohnányi.  In the 1930s, he was a répétiteur at the Hungarian State Opera and worked at the Salzburg Festival for Arturo Toscanini.  His career was interrupted by the rise of the Nazis’ influence on Hungarian politics, and being of Jewish background he fled the increasingly harsh Hungarian anti-Jewish laws in 1938.  After conducting a season of Russian ballet in London at the Royal Opera House he found refuge in Switzerland, where he remained during the Second World War.  Prohibited from conducting there, he earned a living as a pianist. Cynthia Cozette Lee, also known as Cynthia Cozette or Nazik Cynthia Cozette (born October 19, 1953, in Pittsburgh, Pennsylvania) is a contemporary African-American classical music composer and librettist.  Cozette was the first African-American woman to graduate from the University of Pennsylvania with a Masters of Arts Degree in music composition .  Cozette was also the first African-American woman graduate of the University of Pennsylvania to be instructed in music composition by the American composers, George Crumb and George Rochberg.
Answer: Georg Solti