Question: The expert mentor to the celebrities that perform on "Splash!" won the 2009 FINA World Championionship in the individual event at what age? 
Context: Thomas Robert Daley (born 21 May 1994) is a British diver.  Tom Daley specialises in the 10-metre platform event and is a double World champion in the event; he won the 2009 FINA World Championionship in the individual event at the age of 15, before regaining it in 2017.  He was the 2012 Olympic bronze medalist in the event. Splash!  is a British television series that follows celebrities as they try to master the art of diving.  The celebrities perform each week in front of a panel of judges and a live audience in an Olympic-size diving pool with the result each week partly determined by public vote.  Gabby Logan and Vernon Kay present the show, whilst Team GB Olympic Bronze Medal winning diver Tom Daley is the expert mentor to the celebrities.  It is filmed at the Inspire: Luton Sports Village, which is based in Stopsley, Luton.  The show premiered on ITV on 5 January 2013 winning the ratings battle for its 7.15pm-8.15pm slot with an average audience of 5.6 million viewers, a network share of 23.6%, however, it was cancelled on 15 February 2014 after just two series. Zoe Arancini (born 14 July 1991) is an Australian club water polo player who plays driver, counter-attacker, or outside shooter.  Several of her family members have represented her country in water polo.  She plays club water polo in the National Water Polo League for the Fremantle Marlins, where she has won the league championship in 2005, 2007 and 2008 and is coached by her mother.  She has represented the country as a member of the Australia women's national water polo team on the junior and senior level, with over eighty appearances for national team between the two levels.  She has earned a gold medal at the 2011 Canada Cup, silver medals at the 2010 FINA World League Super Finals and 2010 FINA World Cup, and bronze medals at the 2009 FINA World League Super Finals and 2011 FINA Junior World Championships.  She has been included on the roster to represent the country at the 2012 Summer Olympics. Nikitas Kocheilas (Greek: Νικήτας Κόχειλας ; born 1 March 1983) is a Greek water polo player.  As a member of Greece men's national water polo team, he won the bronze medal at the 2006 FINA World League and competed at the 2006 European Championship, the 2006 FINA World Cup and the 2008 FINA World League.  Kocheilas was also part of the Greek national team that was crowned World Champion at the 2001 Junior World Championship in Istanbul. Eszter Anita Tomaskovics (born 23 August 1987) is an Hungarian female water polo player.  She was a member of the Hungary Women's National Team.  She was a part of the Hungarian team that claimed the gold medal at the 2005 FINA World Championship in Montreal, Canada.  She also competed in the 2007 and 2009 FINA World Championships.  At club level, she has played most notably for Vasas, Honvéd (2005–2008) and Olympiacos (2008–2010), winning numerous titles. Alicia McCormack (born 7 June 1983 in Helensburgh, New South Wales) is an Australian water polo goalkeeper.  Her playing career started at the age of fourteen with the Kirrawee High School water polo team, and today she plays for the Cronulla Water Polo Club in the National Water Polo League and is a member of the Australia women's national water polo team.  Although she did not play water polo in 2010 due to injury, McCormack has won gold medals at the 2006 Commonwealth Games and the 2006 FINA World Cup; a silver medal at the 2007 FINA World Championships; and bronze medals at the 2008 and 2012 Summer Olympics, 2005 FINA World League Super Finals, 2008 FINA World League Super Finals and 2009 FINA World League Super Finals.  Currently working at the New South Wales Institute of Sport, McCormack is studying for a Bachelor of Primary Education. This is a list of the best results achieved by athletes from different nations at four major competitions where swimming events are (or were) competed.  Results are based on major competitions according to FINA's historical records: the swimming and open water swimming events at the Olympic Games, the swimming and open water swimming events at the FINA World Aquatics Championships, the FINA Short Course Swimming World Championships and the defunct FINA World Open Water Swimming Championships.  The results listed here only refer to swimming and open water swimming events.  Medals earned by athletes from defunct NOCs or historical teams have been merged with the results achieved by their immediate successor states, as follows: Russia inherits medals from the Soviet Union and the Unified Team; Serbia inherits medals from Yugoslavia; Australia inherits medals from Australasia; and Germany inherits medals from West Germany and East Germany.  The table is pre-sorted by total number of gold medal results, silver medal results and bronze medal results, respectively.  When equal ranks are given, countries are listed in alphabetical order. The FINA World Masters Championships (or "Masters Worlds") is an international Aquatics championships for adults (per FINA rules, Masters are 25 years old and older).  The championships is held biennially, with competition in all five of FINA's disciplines: Swimming, Diving, Water polo, Open water swimming, and Synchronized swimming.  Starting in 2015, the competition will be held jointly with the FINA World Aquatics Championships. Glencora Ralph (born 8 August 1988) is an Australian water polo centre back/driver.  She attended the Curtin University of Technology and is a dental therapist.  She competes for the Fremantle Marlins in the National Water Polo League, and was on sides that won the league championship in 2003, 2004, 2006 and 2007.  She has been a member of the Australia women's national water polo team on the junior and senior level.  She has won gold medals at the 2011 Canada Cup and at the 2007 FINA Junior World Championships.  She won silver medals at the 2010 FINA World League Super Finals and at the 2010 FINA Women's Water Polo World Cup.  She won a bronze medal at the 2009 FINA World League Super Finals.  She was part of the Australian water polo team that won bronze at the 2012 Summer Olympics. The 2010 FINA Diving World Cup was held in Changzhou, Jiangsu, People's Republic of China from June 2 to June 6, 2010.  It was the 17th FINA Diving World Cup competition.  146 divers from 33 countries and regions competed in this World Cup.  The 2010 FINA Diving World Cup is held one year after the 2009 FINA Diving World Championships which was held in Rome.
Answer: 15