Question: "Battle of the Heroes" is a musical theme from a movie, that was written by which American composer, conductor, and pianist, with a career spanning over six decades?
Context: Rudolf Matz (September 19, 1901 – March 22, 1988) was a Croatian composer who wrote about 500 instrumental and vocal compositions.  Matz lived in the Austro-Hungarian Empire in the Kingdom of Croatia-Slavonia.  He was born in Zagreb, 1901 and died in that same city in 1988.  He was an important figure in the musical life of Zagreb in the 20th century.  In addition to working as a composer, he was a cellist, teacher, conductor and choirmaster.  He worked in music for more than six decades – from 1920 right up to his death.  He performed with eminent professional musicians as well as with skilled amateurs.  His wife Margita was a pianist, harpsichordist and keyboard teacher. Ernestine Anderson (November 11, 1928 – March 10, 2016) was an American jazz and blues singer.  In a career spanning more than six decades, she recorded over 30 albums.  She was nominated four times for a Grammy Award.  She sang at Carnegie Hall, the Kennedy Center, the Monterey Jazz Festival (six times over a 33-year span), as well as at jazz festivals all over the world.  In the early 1990s she joined Qwest Records, the label of fellow Garfield High School grad Quincy Jones. "Battle of the Heroes" is a musical theme from the movie "" that was written by John Williams. John Towner Williams (born February 8, 1932) is an American composer, conductor, and pianist.  With a career spanning over six decades, he has composed some of the most popular and recognizable film scores in cinematic history, including "Jaws", the "Star Wars" series, "Close Encounters of the Third Kind", "Superman", "E.T. the Extra-Terrestrial", the "Indiana Jones" series, the first two "Home Alone" films, the first two "Jurassic Park" films, "Schindler's List", and the first three "Harry Potter" films.  Williams has been associated with director Steven Spielberg since 1974, composing music for all but three of his feature films.  Other notable works by Williams include theme music for the Olympic Games, "NBC Sunday Night Football", "The Mission" theme used by NBC News, the television series "Lost in Space" and "Land of the Giants", and the incidental music for the first season of "Gilligan's Island".  Williams has also composed numerous classical concertos and other works for orchestral ensembles and solo instruments.  From 1980 to 1993, he served as the Boston Pops' principal conductor, and is now the orchestra's laureate conductor. Sir Patrick Stewart {'1': ", '2': ", '3': ", '4': "} (born 13 July 1940) is an English actor whose career has included roles on stage, television, and film in a career spanning almost six decades.  He is a multiple time Olivier, Golden Globe, Emmy, Screen Actors Guild and Saturn Award nominee. Ira Beaman Joralemon (1884 – 1975) was an American mining engineer, economic geologist, and mining company executive, who specialized in exploration and mining of copper ore deposits.  Over a career spanning more than six decades, Joralemon was involved in the discovery and development of numerous major copper and gold deposits, many of which went on to become operational mines.  In addition to his professional career within the minerals industry, he was also a popular science author and historian of the mining industry. Halim Abdul Messieh El-Dabh (Arabic: حليم عبد المسيح الضبع‎ ‎ , "Ḥalīm ʻAbd al-Masīḥ al-Ḍab"ʻ; March 4, 1921 – September 2, 2017) was an Egyptian American composer, musician, ethnomusicologist, and educator, who has had a career spanning six decades.  He is particularly known as an early pioneer of electronic music.  In 1944 he composed one of the earliest known works of tape music, or musique concrète.  From the late 1950s to early 1960s he produced influential work at the Columbia-Princeton Electronic Music Center. Norma Deloris Engstrom (sometimes also spelled "Egstrom"; May 26, 1920 – January 21, 2002) known professionally as Peggy Lee, was an American jazz and popular music singer, songwriter, composer, and actress, in a career spanning six decades.  From her beginning as a vocalist on local radio to singing with Benny Goodman's big band, she forged a sophisticated persona, evolving into a multi-faceted artist and performer.  During her career, she wrote music for films, acted, and recorded conceptual record albums that combined poetry and music. Andor John Toth (June 16, 1925 – November 28, 2006) was an American classical violinist, conductor and educator with a musical career spanning over six decades.  Toth played his violin on the World War II battlefields of Aachen, Germany; performed with the NBC Symphony Orchestra under Arturo Toscanini in 1943 at age 18; and formed several chamber music ensembles, including the Oberlin String Quartet, the New Hungarian Quartet, and the Stanford String Quartet.  For 15 years he was the violinist in the Alma Trio.  Toth conducted orchestras in Cleveland, Denver and Houston.  In 1969, he was the founding concertmaster of the Los Angeles Chamber Orchestra under Neville Marriner.  Toth taught at five important colleges and universities, and recorded for Vox, Decca Records and Eclectra Records. Willis Leonard Holman (born May 21, 1927), also known as Bill Holman, is an American composer/arranger, conductor, saxophonist, and songwriter working primarily in the jazz and pop idioms.  His professional music career is over six decades long, most notably starting with the Charlie Barnet orchestra in 1950.  He is a multi-Grammy winning artist (nominated for 13 Grammys, 3 wins) and is most commonly known for his long association with the Stan Kenton Orchestra.  He was honored as a 2010 National Endowment of the Arts Jazz Masters recipient.
Answer: John Towner Williams