Question: Were both Rudolph Polk and Simon West concert violinists?

full_context: Document 1: Con Air: Con Air is a 1997 American action film directed by Simon West, written by Scott Rosenberg, and produced by Jerry Bruckheimer, producer of "The Rock". The film stars Nicolas Cage, John Cusack, and John Malkovich alongside Steve Buscemi, Colm Meaney, Mykelti Williamson, Ving Rhames, Nick Chinlund, Jesse Borrego, Jose Zuniga, and Monica Potter.
Document 2: The Expendables 2: The Expendables 2 is a 2012 American ensemble action film directed by Simon West, written by Richard Wenk and Sylvester Stallone and based on a story by Ken Kaufman, David Agosto and Wenk. Brian Tyler returned to score the film. It is the sequel to the 2010 action film "The Expendables", and stars Sylvester Stallone, Jason Statham, Jet Li, Dolph Lundgren, Chuck Norris, Terry Crews, Randy Couture, Liam Hemsworth, Jean-Claude Van Damme, Bruce Willis, and Arnold Schwarzenegger. The story follows the mercenary group known as "the Expendables" as they undertake a seemingly simple mission which evolves into a quest for revenge against rival mercenary Jean Vilain, who murdered one of their own and threatens the world with a deadly weapon. It is the second installment in "The Expendables" film series.
Document 3: Arturo Toscanini: Arturo Toscanini (] ; March 25, 1867 – January 16, 1957) was an Italian conductor. He was one of the most acclaimed musicians of the late 19th and of the 20th century, renowned for his intensity, his perfectionism, his ear for orchestral detail and sonority, and his eidetic memory. He was at various times the music director of La Scala in Milan, the Metropolitan Opera in New York, and the New York Philharmonic. Later in his career he was appointed the first music director of the NBC Symphony Orchestra (1937–54), and this led to his becoming a household name (especially in the United States) through his radio and television broadcasts and many recordings of the operatic and symphonic repertoire. Toscanini had absolute pitch.
Document 4: Władysław Szpilman: Władysław Szpilman (] ; 5 December 19116 July 2000) was a Polish pianist and classical composer of Jewish descent. Szpilman is widely known as the central figure in the 2002 Roman Polanski film "The Pianist", which was based on Szpilman's autobiographical account of how he survived the German occupation of Warsaw and the Holocaust.
Document 5: Simon West: Simon West (born 1961) is an English film director and producer best known for directing blockbuster action films like "Con Air, ," and "The Expendables 2".
Document 6: Vladimir Horowitz discography: The Russian-American classical virtuoso pianist Vladimir Horowitz was a recording artist for over 60 years; beginning in 1926 on a piano roll system for Welte-Mignon, then with audio recordings, starting in 1928 for the Victor Talking Machine Company, later RCA Victor. Horowitz continued to record for a variety of record labels throughout his life. Between 1962 and 1973 he recorded for Columbia Masterworks In 1975, Horowitz returned to RCA, with which he recorded a series of live recitals. For the last years of his life, between 1985 and 1989, Horowitz recorded for Deutsche Grammophon. Horowitz’s final recording, with Sony Classical, was completed in November 1989, four days before his death. This final recording consisted of repertoire that he had never previously recorded.
Document 7: Simon Wincer: Simon Wincer (born 1943 in Sydney) is an Australian film director and film producer. He attended Cranbrook School, Bellevue Hill, Sydney from 1950 to 1961. On leaving school he worked as a stage hand at TV Station Channel 7. By the 1980s he directed over 200 hours of television. In 1986 he directed the made-for-TV movie "The Last Frontier" and also won a Christopher Award.
Document 8: Simon J. Smith: Simon J. Smith is an English director, animator, visual effects artist and occasional voice actor, best known for his work at DreamWorks Animation. Smith came to PDI/DreamWorks in 1997 as head of layout for the company's feature film division. A CG animation veteran with nearly 25 years of experience, Smith supervised the layout department on PDI/DreamWorks' first animated feature "Antz", serving as the head of layout in "Shrek". He then directed the Universal Studios Theatre experience "Shrek 4-D", followed by the short "Far Far Away Idol". His first feature film as a director was in 2007, with "Bee Movie" . He then directed another DVD short, "", before co-helming, with Eric Darnell, the comedy/spy action spin-off from the "Madagascar" series, "Penguins of Madagascar".
Document 9: Wilm Hosenfeld: Wilhelm Adalbert Hosenfeld (] ; 2 May 1895 – 13 August 1952), originally a school teacher, was a German Army officer who by the end of the Second World War had risen to the rank of "Hauptmann" (Captain). He helped to hide or rescue several Polish people, including Jews, in Nazi-occupied Poland, and helped Polish-Jewish pianist and composer Władysław Szpilman to survive, hidden, in the ruins of Warsaw during the last months of 1944, an act which was portrayed in the 2002 film The Pianist. He was taken prisoner by the Red Army and died in Soviet captivity seven years later.
Document 10: Leopold Stokowski: Leopold Anthony Stokowski (18 April 188213 September 1977) was an English conductor of Jewish-Polish and Irish descent. One of the leading and influential conductors of the early and mid-20th Century, he is best known for his long association with the Philadelphia Orchestra and for appearing in the film "Fantasia". He was especially noted for his free-hand conducting style that spurned the traditional baton and for obtaining a characteristically sumptuous sound from the orchestras he directed.
Document 11: S. Sylvan Simon: S. Sylvan Simon (March 9, 1910 – May 17, 1951) was an American stage/film director and producer.
Document 12: Georg Kulenkampff: Alwin Georg Kulenkampff-Post (23 January 1898 – 4 October 1948) was a German virtuoso violinist. One of the most popular German concert violinists of the 1930s and 1940s, he was considered one of the finest violinists of the 20th century.
Document 13: Tony Scott: Anthony David Leighton Scott (21 June 1944 – 19 August 2012) was an English film director and producer. His films come from a broad range of genres, including the action drama "Top Gun" (1986), action comedy "Beverly Hills Cop II" (1987), auto racing film "Days of Thunder" (1990), action comedy "The Last Boy Scout" (1991), romantic dark comedy crime film "True Romance" (1993), submarine action film "Crimson Tide" (1995), psychological thriller "The Fan" (1996), spy thriller "Enemy of the State" (1998), spy film "Spy Game" (2001), action thriller "Man on Fire" (2004), sci-fi action thriller "Déjà Vu" (2006), thriller "The Taking of Pelham 123" (2009), and the action thriller "Unstoppable" (2010).
Document 14: Rhythm Orchestra (Hartford/ Springfield): The Rhythm Orchestra Teraz Rhythm band was a Polish musical group that was active from the early 1970s to early 1990s in New England and eastern Canada. The group performed a wide range of folk and popular music styles including polka, oberek, waltz, rock (medium and slow), country, tango, cha-cha-cha, foxtrot, swing, and rumba. As a favorite among the Polish diaspora or Polonia of the Greater Hartford, Connecticut and Springfield, Massachusetts region, the group played at dances, weddings, picnics, festivals, and anniversaries which were frequently held at venues such the Polish National Home in Hartford, Connecticut, Gen. Haller Post 111 and the Falcons Nest 88 in New Britain, Connecticut, Polish National Alliance Park in Wallingford, Connecticut, and Piłsudski Park in Holyoke, Massachusetts. The group's first record album, "Our Homeland", was released in 1972 on the Holyoke based Rex Records label, which was founded by Joe "Papa" and Wanda Chesky, parents of Polka Hall of Famer Larry Chesky. Subsequent albums were released on the group's own record label, Wisła Records, which was based in Newington, Connecticut, and Westfield, Massachusetts. Four out five of the group's original members were born in Poland where their musical interests began.
Document 15: Rudolph Polk: Rudolph ("Rudy") Polk (25 November 1892 New York, New York – 16 June 1957 Los Angeles) was an American concert violinist based in New York City during his early years and, during his later years, a Hollywood film director, film industry executive, and artist manager for Jascha Heifetz, Vladimir Horowitz, José Iturbi, and Gregor Piatigorsky. In Hollywood, Polk was the assistant musical director to Morris Stoloff at Columbia Pictures. After World War II, Polk was musical director for Enterprise Studios.
ground_truth: no