Arnaud Ghislain (born December 2, 1988 in Belœil) is a Belgian sprinter, who specialized in the 400 metres.
 He is an indoor national senior champion for his category, and also a member of the Belgian national track relay team.
Bohdan "Don" Domansky (born August 11, 1946 in Ulm, Germany) is a retired track and field athlete, who represented Canada at two Summer Olympics (1968 and 1976), two British Commonwealth Games (1966 and 1970) and two Pan Am Games in 1967 and 1975 in the 400 metres and the 4x400 metre relay.
 He won medals at the British Commonwealth Games (silver 1966 4x400 metre relay, bronze in 1966 400 metres, medals at the Pan Am Games (silver in 1975 4x400 metre relay, bronze in 1967 400 metres) and achieved a 4th in the 4x400 metres in the Olympics in 1976.
 As member of the UCLA (University of California, Los Angeles) Don was a team NCAA champion, 4x400 metre NCAA champion and was a world record holder in the 440 yard relay in 1966.
 He held the Canadian individual open record in the 400 metres from 1967 to 1977 and helped set the Canadian 4x400 metre record in 1976 which still stands today.
 Track and Field News ranked him 4th in the world in the 400 metres in 1967.
 His fastest performance was a 44.3 400 metre relay split in the 1966 British Commonwealth Games.
Linda Staines (née Keough, born 28 December 1963) is a former British athlete who competed mainly in the 400 metres.
 She represented Great Britain at the 1988 Olympic Games in Seoul in both the 400 metres and 4 x 400 metres relay, and won a bronze medal in the 4 × 400 m relay at the 1993 World Championships.
 She also won four medals at the Commonwealth Games, including a silver medal in the 400 metres in 1990.
Stephenie Ann McPherson (born 25 November 1988) is a Jamaican track and field athlete, who specializes in the 400 metres.
 McPherson competed in the 400 metres at the 2013 World Championships in Athletics where she finished third.
 McPherson is also a silver medalist from the 2014 IAAF World Indoor Championships as a member of the 4 x 400 metres relay team.
 In capping what has been a medal rich year, Stephenie won two gold medals at the 2014 Commonwealth Games in the individual 400 metres and 4 x 400 metres.
 Within that same year she also achieved a gold medal at the IAAF Continental Cup as a part of Team America in the 4 × 400 m.
Tsvetelina Kirilova (Bulgarian: Цветелина Кирилова ) (born July 14, 1977) is a Bulgarian track and field athlete who competes in the 400 metres, the 800 metres and the 400 metres hurdles.
 Her personal bests are 51.63 in the 400 metres achieved at Ankara on May 22, 1999, 1:59.63 in the 800 metres achieved at Luzern on June 27, 2001 and the 55.22 in the 400 metres hurdles achieved at Beijing on August 17, 2008.
Jessica "Jess" Gulli-Nance (born 19 March 1988) is an Australian athlete specialising in the 400 metres and 400 metres hurdles.
 She competed in the 4 × 400 metres relay event at the 2015 World Championships in Beijing without qualifying for the final.
 Her personal bests are 53.22 seconds in the 400 metres (Melbourne 2015) and 57.30 seconds in the 400 metres hurdles (Melbourne 2014).
Tracy Carol Joseph (née Goddard) (born 29 November 1969) is a British former athlete who competed in the 400 metres and 4 × 400 metres relay.
 She was part of the teams that came third in the 4 x 400 metres relay at the 1993 World Championships in Stuttgart, and won the 4 x 400 metres relay at the 1994 Commonwealth Games in Victoria, British Columbia, Canada.
Claudia Marx (born 16 September 1978 in East Berlin) is a German athlete.
 She runs in the 400 metres and the 400 metres hurdles (which she started in 2005).
 She also competes in the German team in the 4 × 400 metres relay.
 She won the 400 metres at the German Athletics Championships in 2003 and 2004 and in the National Indoor Championships in 2005.
 She is 1.72 metres tall and weighs 59 kg.
 She currently studies sport sciences at the Humboldt University of Berlin.
 she came 4th in 400m hurdles.
Peirresha Alexandra Shakes-Drayton (born 21 December 1988) is a British track and field athlete who competes in the 400 metres hurdles and the 400 metres sprint.
 A knee injury at the 2013 World Championships forced Shakes-Drayton to switch events upon her return to athletics.
 She is the 2013 European Indoor Champion in the 400 metres and won a 2012 World Indoor Championship gold medal in the 4 x 400 metres relay.
 She has also won silver and bronze medals in the 4 x 400m relay at the World Championships.
The 400 metres, or 400 metre dash, is a common sprinting event in track and field competitions.
 It has been featured in the athletics programme at the Summer Olympics since 1896 for men and since 1964 for women.
 On a standard outdoor running track, it is one lap around the track.
 Runners start in staggered positions and race in separate lanes for the entire course.
 In many countries, athletes previously competed in the 440 yard dash (402.336 m)—which is a quarter of a mile and was referred to as the 'quarter-mile'—instead of the 400 m (437.445 yards), though this distance is now obsolete.
 An athlete who competes in the 400 m may still be referred to as 'quarter-miler'; the distance or event might still be called the "quarter."

Question: What does Arnaud Ghislan and 400 metres have in common?
Answer: track