Question: The expert mentor to the celebrities that perform on "Splash!" won the 2009 FINA World Championionship in the individual event at what age? 

Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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. [END]  
Answer: 15
15