Question: What principal dancer in the Bolshoi ballet, born in 1988, is a student of Valery Lagunov?
Context: David Hallberg is American classical ballet dancer.  He is a principal dancer for American Ballet Theatre and resident guest artist at the Australian Ballet, and formerly a principal dancer with the Bolshoi Ballet. Roberto Bolle (Casale Monferrato, March 26, 1975) is an Italian danseur.  He is currently a "principal dancer" with the American Ballet Theatre and a principal dancer "étoile" at La Scala Theatre Ballet.  Bolle also dances regularly as a guest artist with the world’s leading companies, including The Royal Ballet, the Mariinsky Ballet, the Bolshoi Ballet and the Paris Opera Ballet. Lagunov was born on July 2, 1942 in Moscow, Russia.  In 1962 he graduated from the Moscow State Choreographic Academy where his teacher was Aleksey Yermolayev, and same year joined Bolshoi Ballet.  He first appeared in "Scriabiniana" as "Garland" in 1962 and four next year played in "Sleeping Beauty" as "Prince".  In 1966 he played as one of the shepherd boys in "the Nutcracker" and five years later appeared as "Archon" in "Icarus".  In 1972 he participated in the "Swan Lake" where he played a role of "Evil genius" and the same year played a role as a "dance teacher" in "Cinderella".  Three years later he appeared as "Albrecht" in "Giselle" and by 1976 played a role of "black man" in "Mozart and Salieri".  The same year he was named "Merited Artist of the Russian Federation" and also appeared as "Don Juan" in "Love for Love".  In 1979 he graduated from the Russian University of Theatre Arts and retired as a dancer in 1983.  Since 1996 he teaches such future ballet dancers as Mikhail Lobukhin and Vladislav Lantratov. Valentina Kozlova (born August 26, 1957) is a Soviet-born Russian American ballerina and founder of Valentina Kozlova International Ballet Competition.  In 1979, while on tour as a young principal dancer with the Bolshoi Ballet, Kozlova defected to the United States, where she became a principal dancer with New York City Ballet and later, opened her own ballet school.  Perhaps best known as a lyrical and expressive ballerina, Kozlova is also renowned as a private coach, producing students who have gone on to garner prestigious prizes and positions in companies such as Boston Ballet, American Ballet Theatre Washington Ballet, Stuttgarter Ballet, Les Ballets Trocadéro de Monte Carlo, Universal Ballet, and the National Ballet of Cuba. Vladislav Lantratov (Russian: Владислав Валерьевич Лантратов ; 8 October 1988) is a Russian principal dancer in the Bolshoi Ballet. Joy Womack is an American ballet dancer.  She is the first American to graduate from the Bolshoi Ballet Academy’s main training program, and the first American woman to sign a contract with the Bolshoi Ballet.  She is currently a principal dancer at the Kremlin Ballet Theater in Russia. Evan McKie (born April 7, 1983) is a Canadian ballet dancer, writer, and artist.  London's "Dance Europe" Magazine recently stated that McKie's performances are "within the realm of best in the World."  He is a Principal Dancer with the National Ballet of Canada and has the rare opportunity to perform as a guest dancer with companies including the Paris Opera Ballet, Bolshoi Ballet, Mariinsky Ballet and Tokyo Ballet.  In a statement to the The Toronto Star Newspaper, The National Ballet of Canada's Artistic Director, Karen Kain, noted "McKie is one of the finest dancers of his generation."  McKie continues to have very close ties with the Stuttgart Ballet, where he trained and rose through the company's ranks.  He is also a contributor and Advisory Board member for American Dance Magazine and has been a freelance contributor for Canada's National newspaper, The Globe and Mail, often writing preview pieces for upcoming productions. Irek Mukhamedov OBE (born March 8, 1960 in Kazan, USSR), is a Soviet-born ballet dancer of Tatar origin who has danced with the Bolshoi Ballet & the Royal Ballet He trained at the Moscow Choreographic Institute under the guidance of Alexander Prokofiev between 1970 and 1978.  Upon graduation he joined the Classical Ballet Company, where he spent three years touring around the world.  It was with this company that he first danced Romeo, a role that was to become one of his most acclaimed.  In 1981 he won the Grand Prix and Gold Medal at the International Ballet Competition in Moscow and was immediately invited to join the Bolshoi Ballet as a principal dancer, where he not only became Grigorovich's favourite danseur but went to become the youngest man ever to dance the leading role in "Spartacus".  After leaving the Soviet Union, he became a Senior Principal Dancer with the Royal Ballet in London, remaining with the company for many years and dancing lead roles in the classic ballets as well as the English repertoire. Friedemann Vogel (born 1 August 1979) is a German ballet dancer who performs with Stuttgart Ballet as a Principal Dancer and as a frequent guest artist at major ballet houses around the world including La Scala in Milan and the Bolshoi Ballet Theatre in Moscow.  He has been awarded several prestigious dance prizes including Prix de Lausanne (1997), Prix de Luxembourg (1997), Eurocity Competition in Italy, USA International Ballet Competition(1998) and Erik Bruhn Prize (2002).  In September 2015, he was awarded the national title "Kammertänzer" - the highest honor in Germany that can be bestowed on a dancer.  In the following year, 2016, he was awarded the "Prix Maya" for "Outstanding Dancer" alongside Aurélie Dupont and Diana Vishneva. Sofia Nikolaevna Golovkina (alternate, Sophia; Russian, Головкина, Софья Николаевна; 13 October 1915 - 17 February 2004) was a Russian ballet dancer, choreographer and teacher.  A graduate of the Moscow State Academy of Choreography in 1933, she was the principal dancer of the Bolshoi Ballet till 1959.  In 1960, she became director of the Moscow Bolshoi Ballet School.  For her work, Golovkina was awarded the Russian Order of Merit, People's Artist of the Russian Soviet Federative Socialist Republic, and the Order of the Red Banner of Labour.  She died in 2004 in Moscow.
Answer: Vladislav Lantratov