Question: which competition did Ekaterina Vasilieva compete in pairs with the russian pair skater who teamed up with Yuko Kavaguti and win two-time European champions (2010, 2015), two-time World bronze medalists (2009, 2010), two-time ISU Grand Prix Final bronze medalists (11–12 and 15–16), and three-time Russian national champions (2008–2010) ?
Context: Ekaterina Vasilieva (born 9 September 1986) is a Russian former pair skater.  Early in her career, she was a single skater.  In 2005, she began competing in pairs with Alexander Smirnov.  They placed 6th at the 2006 World Junior Championships for Russia.  In the 2007–2008 season, she competed with Daniel Wende for Germany.  They are the 2008 German bronze medalists. Evgenia Maximovna Tarasova (Russian: Евгения Максимовна Тарасова ; born 17 December 1994) is a Russian pair skater.  With partner Vladimir Morozov, she is the 2017 World bronze medalist, the 2017 European champion, the 2016–17 Grand Prix Final champion, and a three-time Russian national medalist (silver in 2015 and 2017, bronze in 2016).  Earlier in their career, they became the 2014 World Junior silver medalists and the 2014 Russian national junior champions. Vladimir Evgenyevich Morozov (Russian: Владимир Евгеньевич Морозов ; born 1 November 1992) is a Russian pair skater.  With partner Evgenia Tarasova, he is the 2017 World bronze medalist, the 2017 European champion, the 2016–17 Grand Prix Final champion, and a three-time Russian national medalist (silver in 2015 and 2017, bronze in 2016).  Earlier in their career, they became the 2014 World Junior silver medalists and the 2014 Russian national junior champions. Oksana Alexandrovna Domnina (Russian: Оксана Александровна Домнина , born 17 August 1984) is a Russian former competitive ice dancer.  She and partner Maxim Shabalin are the 2010 Olympic bronze medalists, the 2009 World Champions, the 2008 & 2010 European Champions, the 2007 Grand Prix Final champions, and three-time (2005, 2007, 2010) Russian national champions. Maxim Andreyevich Shabalin (Russian: Максим Андреевич Шабалин ; born 25 January 1982) is a Russian former competitive ice dancer.  He and partner Oksana Domnina are the 2010 Olympic bronze medalists, the 2009 World Champions, the 2008 & 2010 European Champions, the 2007 Grand Prix Final champions, and three-time (2005, 2007, 2010) Russian national champions. Yuko Kavaguti (also: Kawaguchi, Japanese: "Kawaguchi Yūko" (川口 悠子 ) , Russian: Юко Кавагути , born 20 November 1981) is a pair skater who has represented Japan and Russia in international competition.  In 2006, she began competing with Alexander Smirnov for Russia.  They are two-time European champions (2010, 2015), two-time World bronze medalists (2009, 2010), two-time ISU Grand Prix Final bronze medalists (11–12 and 15–16), and three-time Russian national champions (2008–2010). Alexander Viktorovich Smirnov (Russian: Александр Викторович Смирнов , born 11 October 1984) is a Russian pair skater.  Smirnov teamed up with Yuko Kavaguti in May 2006.  They are two-time European champions (2010, 2015), two-time World bronze medalists (2009, 2010), two-time ISU Grand Prix Final bronze medalists (11–12 and 15–16), and three-time Russian national champions (2008–2010). 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). 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). Mariusz Krzysztof Siudek ( ; born 29 April 1972 in Oświęcim) is a retired Polish pair skater who competed with wife Dorota Siudek (Zagórska).  They are the 1999 World bronze medalists, two-time (1999, 2000) European silver medalists and two-time (2004, 2007) European bronze medalists.  They were the first Polish pair to win a medal at the World Championships.  They now coach together in Toruń, Poland.
Answer: 2006 World Junior Championships