Question: Who is Yulia Zagoruychenko's dance partner?

full_context: Document 1: Natascha Ragosina: Natalia Yurievna Ragozina (Russian: Наталья Юрьевна Рагозина ), better known as Natascha Ragosina, is an undefeated retired professional boxer who spent much of her career ranked as the top female super middleweight in the world. Though born in Kazakhstan (formerly a part of the Soviet Union) and currently residing in Moscow, she competed professionally for Russia and is of Russian descent. She is the longest reigning WBA female super middleweight champion and WBC female super middleweight champion. At the time of her retirement, she held all major female super middleweight titles and two heavyweight belts:
Document 2: Giovanni Bucchieri: Giovanni Bucchieri spent his youth at Pizzeria Romana in Linköping. He established himself early as a prolific dancer, specialised in breakdance and in Street dance. At the age of 15 he moved to Stockholm. Together with his longtime companion Aleksander Maksic he traveled to New York at the age of 16. There they eagerly took part in the frantic club life of New York. It was here that Bucchieri’s love for Vogue was discovered, at various ballroom dances.
Document 3: Katusha Demidova: Katusha Demidova is a Russian professional ballroom dancer and instructor, now residing in the USA. She is the 2009, 2010, 2011, 2012, 2013 and 2014 Professional World Ballroom Dance Champion, and also the International Professional, and British Open, Ballroom Champion. Her partner in these events was Arunas Bizokas. She is the sister of Anna Demidova who is also a dancer.
Document 4: Russia in the Eurovision Dance Contest: Russia took part in the first Eurovision Dance Contest in 2007. The couple chosen to represent the country were Vladislav Borodinov and Maria Sittel. The dances they performed at the contest were Rumba and Paso Doble. Russia came seventh after receiving 72 points from 11 countries. In 2008 they were represented by Tatiana Navka and Alexander Litvinenko who danced a fusion of Cha-Cha, Samba, Rumba, Paso Doble and Russian Folk Dance. The Third Eurovision Dance Contest has been cancelled indefinitely.
Document 5: Julia Kourotchkina: Julia Alexandrovna Kourotchkina "(Russian: Юлия Александровна Курочкина, or Yuliya Aleksandrovna Kurochkina "; born 10 August 1974 in Shcherbinka, Russia) is a Russian actress, model and beauty queen who was crowned Miss Russia 1992 and later crowned Miss World 1992 in Sun City, South Africa.
Document 6: Bruno Tonioli: Bruno Tonioli (] ; born 25 November 1955) is an Italian choreographer, dancer, and TV personality.
Document 7: Riccardo Cocchi: Riccardo Cocchi (born December 7, 1977, Terni, Italy) is a six-time Latin Dance Champion, with his partner, Yulia Zagoruychenko. Currently, he resides in and represents the United States of America. When not busy competing, Riccardo is available for coaching.
Document 8: Joanna Leunis: Joanna Leunis, born 22 May 1981 in Rocourt, Liège, Belgium, is a professional Latin ballroom dancer. With Michael Malitowski, she is a former professional World Latin Dance Champion and the current International Latin American Dance Champion. The couple represented Poland until 2011, representing England from then on.
Document 9: Riccardo Piatti: Riccardo Piatti (born November 8, 1958) is an Italian tennis coach. He has coached several players ranked within the top 10 by the Association of Tennis Professionals (ATP), including Novak Djokovic, Ivan Ljubičić, Richard Gasquet, and Milos Raonic.
Document 10: Yulia Zagoruychenko: Yulia Zagoruychenko (born September 11, 1981) is the current World Latin Dance Champion, with her partner, Riccardo Cocchi.
Document 11: Rick Macci: Rick Macci (born December 7, 1954) is a United States Professional Tennis Association (USPTA) Master Professional, and seven-time USPTA national coach of the year who has trained five number one ranked players—Andy Roddick, Jennifer Capriati, Maria Sharapova, Serena Williams, and Venus Williams.
Document 12: Roberto Cocco: Roberto Cocco (born May 16, 1977) is an Italian super middleweight Muay Thai kickboxer and boxer, fighting out of Dojo Miura in his home town of Turin, Italy. He is a former three time I.S.K.A. kickboxing world champion and one time World Kickboxing Network (W.K.N.) Thai-boxing world Champion.
Document 13: Michael Malitowski: Michael Malitowski is a ballroom dancer, a former World Latin Dance Champion with his partner Joanna Leunis. Michael (christened "Michał") was born 28 May 1980, in Zielona Góra, Poland. His partnership with Leunis has, since 2002, resulted in a string of victories: in 2008 and 2009 they won the World Professional Latin title, and in 2012 they won first place in Latin dance at the Blackpool Dance Festival. This is the prestigious Open British Championships held every year in Blackpool, England. Before that, he won the Polish Latin dance championship four times with Iwona Golczak.
Document 14: Riccardo Schicchi: Riccardo Schicchi (] ; Augusta, Sicily, 14 March 1953 - Rome, 9 December 2012) was an Italian pornographer.
Document 15: Ukraine in the Eurovision Dance Contest: Ukraine took part in the first Eurovision Dance Contest in 2007. Representing the country were Yulia Okropiridze, a student of Kyiv National University of Culture and Arts, and Illya Sydorenko, a professional in ballroom choreography. The dances they performed on the night were Quickstep and Showdance. Ukraine came second after receiving 121 points from all other countries. Ukraine is arguably the most successful country to date, with two top 3 positions, despite not winning yet. Lilia Podkopayeva and Kirilo Hitrov represented the country in the 2008 contest. The Third Eurovision Dance Contest has been cancelled indefinitely.
ground_truth: Riccardo Cocchi