Question: Daniel Goodfellow's 2016 Olympic partner specialises in what?

Context articles: Daniel Goodfellow
Mario &amp; Sonic at the Rio 2016 Olympic Games
Carmen Martínez
Roman Fosti
David Hughes (sailor)
Saeid Marouf
John Teeters
Matthew Hudson-Smith
Ievgeniia Tetelbaum
Tom Daley

Daniel "Dan" Goodfellow (born 19 October 1996) is a British diver and an Olympic bronze medalist.
 He first represented Great Britain as a senior at the 2013 European Diving Championships in the 10 m platform event and the 2013 World Aquatics Championships in the same event.
 Goodfellow won a bronze medal in the Men's 10m Synchronised Platform event with his diving partner Tom Daley at the 2016 Summer Olympic Games in Rio de Janeiro.
Mario & Sonic at the Rio 2016 Olympic Games is a video game in the "Mario & Sonic at the Olympic Games" series, released for the Nintendo 3DS in February 2016 in Japan, March 2016 in North America, and in April 2016 for Europe and Australia, and for the Wii U worldwide in June 2016.
 The game is officially licensed by the International Olympic Committee, as have the other games in the series.
 It was developed by Sega Sports R&D, with assistance from Arzest and Spike Chunsoft, and published by Nintendo.
 It is the fifth title in the "Mario & Sonic at the Olympic Games" series.
 The game is a collection of Olympic sports themed mini-games featuring characters from the Mario series and the Sonic the Hedgehog series.
Carmen Patricia Martínez (born 26 December 1982) is a Paraguayan long distance runner who specialises in the marathon.
 She finished 115th in the 2016 Olympic marathon in a time of 2 hours 56 minutes and 43 seconds.
 She served as the flag bearer for Paraguay during the closing ceremony.
Roman Fosti (born 6 June 1983) is an Estonian long-distance runner who specialises in the marathon.
 He competed at the 2015 World Championships in Beijing finishing 20th, the 2016 Olympic Games in Rio de Janeiro finishing 61st, and the 2017 World Championships in London finishing 53rd.
 He previously competed mostly in middle-distance events switching to the marathon in 2013.
David "Dave" Hughes (born January 22, 1978 in Ithaca, NY) - US Olympian, World champion, and professional sailor.
 Hughes was a member of the 2016 US Olympic Team.
 He is best known for his accomplishments on the Olympic sailing circuit as both an athlete and coach.
 Hughes was a US Olympic Team coach at the 2012 London Olympics, coaching Erik Storck and Trevor Moore in the 49er class.
 David is a 2x National champion and 3x North American champion in the 470 class.
 He has won 5x World Cup Gold Medals and 2x European Championship medals.
 Notable highlights include recent Gold Medals at the 2017, 2016, and 2013 Sailing World Cup Miami, 2015 Europeans Championships, 2015 Sailing World Cup Weymouth, as well as multiple medals in other Olympic and non-Olympic events, including winning the 2016 Melges 24 World Championship.
 He burst onto the Olympic scene with a win at the 2005 Kiel Week Regatta with Michael Anderson-Mitterling.
 After the 2012 Olympics, Hughes partnered with two-time Olympian Stuart McNay.
 The two qualified together for the 2016 Olympic Games, representing the US in the Men's 470 two-person discipline.
 Hughes has three-times been nominated for US Yachtsman of the Year.
 He is a duel citizen of both the US and France.
 He holds both Batchelor's and master's degrees; he was a US Senate, US House, and White House West Wing intern during years 1996-1998.
 Hughes currently lives in Miami, FL.
Mir Saeid Marouf Lakrani (Persian: میر سعید معروف لكرانی‎ ‎ , born 23 September 1985 in Urmia) is an Iranian volleyball setter.
 He is the captain of the Iranian national team.
 He was named best setter at the 2014 World League and 2008, 2012 and 2016 Olympic qualifying tournaments, as well as most valuable player at the 2013 Asian Championship.
 He participated in the 2016 Olympic Games in Rio de Janeiro, Brazil.
 He was voted Iranian Sportsmen of the year for (2015–16) of the Iranian calendar by an Iranian TV.
John Teeters (born May 14, 1993) is an American sprinter.
 He is from Edmond, Oklahoma, United States where he ran for Edmond Memorial High School.
 Teeters more recently ran for Oklahoma State University.
 He competed in the 2016 Olympic Trials, the NCAA Championships, and the Big 12 Championships.
 In the 2015 NCAA Division I Indoor Track and Field Championships he earned a silver in the 60m dash.
 He was also the sixth best in the world in 60m in 2015.
 In the 2016 Olympic trials preliminaries, he ran a personal best 10.00s 100 meters.
 He has also run a wind aided 9.91 (+4.2) for 100 meters.
 The 10.00 ties him with Marian Woronin of Poland and Koji Ito of Japan as the third fastest non-African sprinter of all time; this also makes him the fastest American of non-African descent of all time.
 He now runs professionally for Under Armour.
Matthew Hudson-Smith (born 26 October 1994) is a British track and field sprinter who specialises in the 400 metres.
 He holds a personal best of 44.48 seconds for the distance set at the 2016 Olympic Games
Ievgeniia Tetelbaum (born July 31, 1991) is an Israeli Olympic synchronized swimmer.
 She was born in Ukraine, and made an Aliyah when she was 18 years old.
 She was the Reserve swimmer of Israel in 2012 Olympics.
 After the Olympics, She started to compete with Anastasia Gloushkov as a partner.
 They placed 12th in 2014 European Aquatics Championships and 20th in 2015 World Aquatics Championships.
 In 2016, Tetelbaum and Gloushkov placed 12th in the 2016 Olympic Qualification Tournament and will represent Israel at the 2016 Summer Olympics.
 Next this year, Tetelbaum and Gloushkov participated in the 2016 European Aquatics Championships, Finishing in 9th place (Free routine) with a score of 80.8667 and 10th place (Technical routine) with a score of 79.7444.
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.