Question: Who collaborated with the American violinist considered on of the greatest on the album West Meets East?
Context: West Meets East is an album by American violinist Yehudi Menuhin and Indian sitar virtuoso Ravi Shankar, released in Britain in January 1967.  It was recorded following their successful duet in June 1966 at the Bath Musical Festival, where they had played some of the same material. The Cádiz Stradivarius of 1722 is an antique violin fabricated by Italian luthier Antonio Stradivari (1644–1737) of Cremona.  The instrument is named after the city Cádiz, Spain where it resided for eighty years.  In 1946 it was acquired by American violinist Joseph Fuchs, and is currently owned by a private American foundation.  The "Cádiz" is on loan to violinist Jennifer Frautschi. Boyd Calvin Tinsley (born May 16, 1964) is an American violinist and mandolinist who performs as a member of the Dave Matthews Band.  Within the band, Tinsley has collaborated in writing songs, harmonizing, and singing backing vocals. Yehudi Menuhin, Baron Menuhin, (22 April 191612 March 1999) was an American-born violinist and conductor who spent most of his performing career in Britain.  He is widely considered one of the greatest violinists of the 20th century. Raymond Gniewek (born November 13, 1931 in East Meadow, New York ) is an American violinist.  He served as concertmaster of the Metropolitan Opera orchestra for 43 years; upon his appointment in 1957 he was the youngest person to ever hold the post.  He has also had a career as a soloist.  His final performance as concertmaster with the orchestra was a concert performance in Carnegie Hall of Béla Bartók's "Bluebeard's Castle" in 2000.  Gniewek is a native of New York City, where he began his musical education; he continued at the Eastman School of Music, studying with Andre de Ribaupierre and Joseph Knitzer, becoming concertmaster of the Eastman Rochester Orchestra and associate concertmaster of Rochester Philharmonic under Erich Leinsdorf.  Other teachers were the Canadian violinist Albert Pratz and Raphael Bronstein of New York City. East Meets East is a collaborative studio album released through EMI Classics in 2003 by violinist Nigel Kennedy and the Kroke band (Jerzy Bawoł on accordion, Tomasz Kukurba on viola and Tomasz Lato on double bass), surrounded by several guest artists of international reputation such as Natacha Atlas, Mo Foster, and the Kraków Philharmonic Orchestra. Harold Wippler (born c. 1928) is an American violinist and teacher from Denver.  Mr. Wippler played as concert master for the Denver Symphony Orchestra, now the Colorado Symphony Orchestra with his late wife Charleen whom he married in August 1951.  The two often played with the Central City Opera Orchestra and spent three years in the early 1950s with the Kansas City Orchestra where Harold was also concert master.  Attending the Curtis Institute of Music after winning the L.A. Concerto Competition, he studied under Efrem Zimbalist.  During his career he collaborated and recorded with noted violinists such as Jascha Heifetz.  Although he has taught multiple international competition winners his most famous student was the talented Eugene Fodor from 1958 to 1968. Frank Xin Huang (born September 5, 1978) is a Chinese-born American violinist and teacher.  Since 2015 he has been the concertmaster of the New York Philharmonic.  Previous to his position in New York, Huang was the first violinist of the Ying Quartet and a professor of violin and chamber music at the Eastman School of Music, then served as the concertmaster of the Houston Symphony from 2010 to 2015.  He has won several international music competitions, most notably the 2003 Naumburg Competition.  Huang has concertized widely as a soloist, and his debut recording on Naxos was critically acclaimed. Nancy Zhou (born January 5, 1993) is an American violinist.  She was the first prize winner of the 2009 Johansen International Competition and of the 2009 Chinese International Violin Competition, a semi-finalist in the 2011 International Tchaikovsky Competition, a finalist and recipient of the Rastor special award for the best performance of Kaija Saariaho's "Tocar" at the 2010 Sibelius International Violin Competition in Helsinki, Finland, a Laureate of the 2012 Queen Elisabeth Competition, a semifinalist and winner of the top prize for Best Performance of Paganini Caprices at the 2014 International Violin Competition of Indianapolis, a semifinalist at the 2015 Joseph Joachim International Violin Competition, and a finalist at the 2015 Sibelius International Violin Competition.  Zhou has performed as a soloist with the China National Symphony Orchestra, Saint Petersburg Philharmonic Orchestra, Munich Symphony Orchestra, National Orchestra of Belgium, Helsinki Philharmonic Orchestra, Finnish Radio Symphony Orchestra, San Antonio Symphony, Royal Stockholm Philharmonic Orchestra, Orchestre Royal de Chambre de Wallonie, Baden-Baden Philharmonic, Oulu Symphony, Central Ostrobothnian Chamber Orchestra, Kuopio Symphony Orchestra, Tapiola Sinfonietta, and several other orchestras, and has performed recitals in the United States, Germany, Switzerland, Austria, China, Taiwan, Russia, Finland, and Belgium.  She has collaborated with conductors Christopher Seaman, Sakari Oramo, Jean-Jacques Kantorow, Sebastian Lang-Lessing, Ken-David Masur, Anna-Maria Helsing, Atso Almila, Jurjen Hempel, John Storgårds, and Hannu Lintu. West Meets East, Volume 2 is an album by American violinist Yehudi Menuhin and Indian sitar virtuoso Ravi Shankar, released in 1968.  It is the second album in a trilogy of collaborations between the two artists, after the Grammy Award-winning "West Meets East" (1967). <ref name="Massey/Shankar obit">Reginald Massey, "Ravi Shankar obituary", "The Guardian", 12 December 2012 (retrieved 3 December 2013). </ref>
Answer: Ravi Shankar