Question: How many seat does the indoor sports arena where "2010 European Taekwondo Championships" housed? 

Context articles: Veronica Calabrese
Para Taekwondo
2016 European Taekwondo Championships
Leonardo Basile
Sandra Šarić
European Taekwondo Championships
Helena Fromm
2010 European Taekwondo Championships
Yubileyny Sports Palace
2014 European Taekwondo Championships

Veronica Calabrese (born November 7, 1987 in Mesagne, Brindisi) is an Italian taekwondo practitioner.
 She won two bronze medals for the 57 and 59 kg classes at the European Taekwondo Championships (2006 in Bonn, and 2010 in St. Petersburg).
 She also captured a silver medal in the same division at the 2009 World Taekwondo Championships in Copenhagen, Denmark, losing out to China's Hou Yuzhuo.
 Calabrese is a member of the taekwondo team for Centro Sportivo Esercito, and is coached and trained by Yoon Soon-Cheul.
 She is engaged to two-time Olympic medalist Mauro Sarmiento.
The WT founded the Para Taekwondo Committee in 2006 to help promote and develop taekwondo for athletes with an impairment.
 At first Para Taekwondo concentrated on developing ‘kyorugi’ (sparring) for arm amputee and limb deficiency athletes.
 The first Para Taekwondo Championships were held in Baku, Azerbaijan, in 2009.
 Following the unsuccessful inclusion on the Rio 2016 Paralympic Games program a working group was put together.
 The working group met to disucss Para Taekwondo in 2013 during the WT World Para Taekwondo Championship, the Para Taekwondo Committee invited guests from Cerebral Palsy International Sports and Recreation Association (CPISRA) and International Sports Federation for Persons with an Intellectual Disability (INAS).
 Following the work group’s recommendations, it was decided to expand Para Taekwondo and to create worldwide competitions available to athletes of all impairments.
 Poomsae was chosen to be included in competitions for athletes with Neurological Impairments, Intellectual Impairments (II) or Visually Impaired (VI).
 Para Taekwondo Poomsae competitions were held for the first time for Intellectually Impaired (II) athletes at the 5 WT World Para Taekwondo Championships in Moscow.
 Para Taekwondo Poomsae was also added as a demonstration sport during the 2015 INAS Global Games and the 2015 CPISRA World Games.
The 2016 European Taekwondo Championships was the 22st edition of the European Taekwondo Championships, and was held in Montreux, Switzerland, from May 19 to May 22, 2016.
Leonardo Basile (born May 12, 1983 in Naples) is an Italian taekwondo practitioner.
 In 2005, Basile had won two bronze medals for the over-84 kg class at the World Taekwondo Championships in Madrid, Spain, and at the Summer Universiade in Izmir, Turkey.
 He also captured a silver medal in the same division at the 2007 Summer Universiade in Bangkok, Thailand, and eventually defeated Slovenia's Ivan Trajkovic for the gold at the 2012 European Taekwondo Championships in Manchester, England.
 Basile is a member of the taekwondo team for Centro Sportivo Esercito, and is coached and trained by Yoon Soon-Cheul.
Sandra Šarić (born May 8, 1984 in Senj) is a Croatian taekwondo athlete.
 Representing Croatia at the 2003 World Taekwondo Championships in Garmisch Partenkirchen, Germany, she won the silver medal in the welterweight (-67 kg) division, losing to 2000 Olympic champion Lee Sun-Hee of South Korea in the final.
 In 2008, she participated in the European Taekwondo Championships in Rome, Italy, and won the gold medal in the middleweight (-72 kg) division.
The European Taekwondo Championships are the European senior championships in Taekwondo, first held in Barcelona 1976.
 They are organized by the European Taekwondo Union, the continental affiliate of the World Taekwondo Federation, which organises and controls Olympic style taekwondo.
Helena Fromm (born 5 August 1987 in Oeventrop, Nordrhein-Westfalen, West Germany) is a German taekwondo athlete.
 Representing Germany at the 2007 World Taekwondo Championships in Beijing, China, she won the bronze medal in the welterweight (–67 kg) division.
 In 2008, she participated in the European Taekwondo Championships in Rome, Italy, and won the gold medal in the welterweight division, winning over Gwladys Épangue of France in the final.
The 2010 European Taekwondo Championships was held at the Yubileyny Sports Palace in Saint Petersburg, Russia, from May 12 to May 15, 2010.
Yubileyny Sports Palace (Russian: Спортивный комплекс "Юбилейный ), "Sportivniy kompleks Yubileyniy"; also translated as Yubileiny (Jubilee) Palace of Sports, is an indoor sports arena and concert complex that is located in St. Petersburg, Russia.
 It houses more than 7,000 seats for ice hockey and basketball.
The 2014 European Taekwondo Championships was the 21st edition of the European Taekwondo Championships, and was held in Baku, Azerbaijan from May 1 to May 4, 2014.