Question: Vladimir Yaroshenko was a soloist with the choreographer who dominated Russian ballet for how many years?

Related documents: [0]  [DOC] Yury Nikolayevich Grigorovich (Russian: Ю́рий Никола́евич Григоро́вич ; born 2 January 1927 in Leningrad) is a Soviet and Russian dancer and choreographer who dominated the Russian ballet for 30 years. [END] 
[1]  [DOC] Vladimir Yaroshenko (Russian: Владимир Ярошенко; born November 2, 1985 in Slavyansk-na-Kubani) – Polish-Russian ballet dancer, first soloist with Yury Grigorovich’s Ballet Theatre, Krasnodar, trained in classical Russian ballet school. Polish resident since 2007, engaged with Teatr Wielki, Warsaw, where since September 2010 is a first soloist of Polish National Ballet under direction of Krzysztof Pastor. [END]  
Answer: 30
30