Question: Zhanna Gromova coached which 2002 Olympic silver medalist?

Documents:
source: Zhanna Gromova
text: Zhanna Gromova Zhanna Fyodorovna Gromova (Russian: Жанна Фёдоровна Громова ; born 22 January 1949 in Vologda) is a Russian figure skating coach. Among her former and current students are Nikolai Morozov, Ilia Averbukh, Sergei Dobrin, Abzal Rakimgaliev and most notably Irina Slutskaya, who had worked with Gromova for her entire career.

source: Ilia Averbukh
text: Ilia Averbukh Ilia Izyaslavovich Averbukh (Russian: Илья Изяславович Авербух , correctly spelled "Ilya"; born 18 December 1973) is a Russian ice dancer. With former wife Irina Lobacheva, he is the 2002 Olympic silver medalist, the 2002 World champion and the 2003 European champion.

source: Ksenia Stolbova
text: Ksenia Stolbova Ksenia Andreyevna Stolbova (Russian: Ксе́ния Андре́евна Столбо́ва ; born 7 February 1992) is a Russian pair skater. With partner Fedor Klimov, she is the 2014 Olympic silver medalist, the 2014 Olympic champion in the team event, the 2014 World silver medalist, a three-time European medalist (2012 bronze, 2014, 2015 silver), the 2015–16 Grand Prix Final champion, the 2013 Winter Universiade champion, a two-time World Junior medalist (2010 bronze, 2011 silver), and a three-time Russian national champion (2014, 2015, 2017).

source: Allyson Felix
text: Allyson Felix Allyson Michelle Felix (born November 18, 1985) is an American track and field sprinter who competes in the 100 meters, 200 meters, and 400 meters. At 200 meters, she is the 2012 Olympic champion, a 3-time World champion (2005–09), and 2-time Olympic silver medalist (2004–08). At 400 meters, she is the 2015 World champion, 2011 World silver medalist, 2016 Olympic silver medalist, and 2017 World bronze medalist.

source: Elena Berezhnaya
text: Elena Berezhnaya Elena Viktorovna Berezhnaya (Russian: Елена Викторовна Бережная , born 11 October 1977) is a Russian former pair skater. With partner Anton Sikharulidze, she is the 1998 and 1999 World champion, 1998 Olympic silver medalist and 2002 Olympic champion.

source: Anton Sikharulidze
text: Anton Sikharulidze Anton Tarielyevich Sikharulidze (Russian: Антон Тариэльевич Сихарулидзе , born 25 October 1976) is a Russian former pair skater. With Elena Berezhnaya, he is the 1998 and 1999 World champion, 1998 Olympic silver medalist and 2002 Olympic champion.

source: Naidangiin Tüvshinbayar
text: Naidangiin Tüvshinbayar Naidangiin Tüvshinbayar (Mongolian: Найдангийн Түвшинбаяр born 1 June 1984) is a Mongolian judoka. He is the 2008 Olympic Champion, 2012 Olympic silver medalist, 2014 Asian games champion, 2015 World Bronze medalist, 2016 Asian championship Gold medalist, 2007 silver medalist and two-time (2008,2011) bronze medalist in -100 kg division.

source: Zhang Hao (figure skater)
text: Zhang Hao (figure skater) Zhang Hao (; born July 6, 1984) is a Chinese pair skater. With current partner Yu Xiaoyu, he is the 2016–17 Grand Prix Final silver medalist and 2017 Asian Winter Games champion. With former partner Peng Cheng, he is the 2015 Four Continents silver medalist. With former partner Zhang Dan, he is the 2006 Olympic silver medalist, a four-time (2005 bronze, 2006, 2008, 2009 silver) World medalist, and a two-time (2005, 2010) Four Continents champion.

source: Irina Lobacheva
text: Irina Lobacheva Irina Viktorovna Lobacheva (Russian: Ирина Викторовна Лобачёва ; born 18 February 1973) is a Russian former competitive ice dancer. With partner Ilia Averbukh, she is the 2002 Olympic silver medalist, the 2002 World champion and the 2003 European champion.

source: Fedor Klimov
text: Fedor Klimov Fedor Alexandrovich Klimov (Russian: Фёдор Александрович Климов ; born 7 September 1990) is a Russian pair skater. With partner Ksenia Stolbova, he is the 2014 Olympic silver medalist, the 2014 Olympic champion in the team event, the 2014 World silver medalist, a three-time European medalist (2012 bronze, 2014, 2015 silver), the 2015–16 Grand Prix Final champion, the 2013 Winter Universiade champion, a two-time World Junior medalist (2010 bronze, 2011 silver), and a three-time Russian national champion (2014, 2015, 2017).

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Answer: Ilia Izyaslavovich Averbukh