With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Since automatic time became mandatory, only Usain Bolt has simultaneously held the world records for both the 100 meter dash and the 200 meter dash.
text_B: Usain St Leo Bolt , OJ , CD -LRB- -LSB- ˈjuːseɪn -RSB- born 21 August 1986 -RRB- is a Jamaican sprinter .. Order of Jamaica. Order of Distinction. sprinter. Sprint ( running ). He is the first person to hold both the 100 metres and 200 metres world records since fully automatic time became mandatory .. 100 metres. 100 metres. 200 metres. 200 metres. fully automatic time. fully automatic time. He also holds the world record as a part of the 4 × 100 metres relay .. 100 metres. 100 metres. world record. List of world records in athletics. 4 × 100 metres relay. 4 × 100 metres relay at the World Championships in Athletics. He is the reigning world and Olympic champion in these three events .. Due to his unprecedented dominance and achievements in sprint competition , he is widely considered to be the greatest sprinter of all time .. sprinter. Sprint ( running ). An eight-time Olympic gold medalist , Bolt won the 100 m , 200 m and 4 × 100 m relay at three consecutive Olympic Games , although he subsequently lost one of the gold medals -LRB- as well as the world record set therein -RRB- nine years after the fact due to teammate Nesta Carter 's disqualification for doping offences .. Olympic Games. Athletics at the Summer Olympics. 100 m. 2015 World Championships in Athletics – Men's 100 metres. 200 m. 200 metres at the Olympics. world record. List of world records in athletics. Olympic gold medalist. List of multiple Olympic gold medalists. Nesta Carter. Nesta Carter. He gained worldwide popularity for his double sprint victory at the 2008 Beijing Olympics in world record times .. 2008 Beijing. 2008 Summer Olympics. world record. List of world records in athletics. 2008 Beijing Olympics. 2008 Beijing Olympics. Bolt is the only sprinter to win Olympic 100 m and 200 m titles at three consecutive olympics -LRB- 2008 , 2012 and 2016 -RRB- , a feat referred to as the `` triple double . ''. 100 m. 2015 World Championships in Athletics – Men's 100 metres. 200 m. 200 metres at the Olympics. sprinter. Sprint ( running ). Olympic 100 m. 100 metres at the Olympics. An eleven-time World Champion , he won consecutive World Championship 100 m , 200 m and 4 × 100 metres relay gold medals from 2009 to 2015 , with the exception of a 100 m false start in 2011 .. 100 m. 2015 World Championships in Athletics – Men's 100 metres. 200 m. 200 metres at the Olympics. 100 metres. 100 metres. 4 × 100 metres relay. 4 × 100 metres relay at the World Championships in Athletics. World Champion. World Championships in Athletics. false start. false start. He is the most successful athlete of the World Championships and was the first athlete to win three titles in both the 100 m and 200 m at the competition .. World Championships. IAAF World Championships in Athletics. 100 m. 2015 World Championships in Athletics – Men's 100 metres. 200 m. 200 metres at the Olympics. most successful athlete. IAAF World Championships in Athletics#Multiple medallist. Bolt improved upon his first 100 m world record of 9.69 with 9.58 seconds in 2009 -- the biggest improvement since the start of electronic timing .. 100 m. 2015 World Championships in Athletics – Men's 100 metres. world record. List of world records in athletics. He has twice broken the 200 metres world record , setting 19.30 in 2008 and 19.19 in 2009 .. 200 metres. 200 metres. world record. List of world records in athletics. 200 metres world record. Men's 200 metres world record progression. He has helped Jamaica to three 4 × 100 metres relay world records , with the current record being 36.84 seconds set in 2012 .. 100 metres. 100 metres. 4 × 100 metres relay. 4 × 100 metres relay at the World Championships in Athletics. 4 × 100 metres relay world records. Men's 4 × 100 metres relay world record progression. Bolt 's most successful event is the 200 m , with three Olympic and four World titles .. 200 m. 200 metres at the Olympics. The 2008 Olympics was his international debut over 100 m ; he had earlier won numerous 200 m medals -LRB- including 2007 World Championship silver -RRB- and holds the world under-20 and world under-18 records for the event .. 100 m. 2015 World Championships in Athletics – Men's 100 metres. 200 m. 200 metres at the Olympics. 2007 World Championship. 2007 World Championships in Athletics. world under-20. List of world junior records in athletics. world under-18 records. List of world youth bests in athletics. His achievements as a sprinter have earned him the media nickname `` Lightning Bolt '' , and his awards include the IAAF World Athlete of the Year , Track & Field Athlete of the Year , and Laureus World Sportsman of the Year -LRB- four times -RRB- .. sprinter. Sprint ( running ). IAAF World Athlete of the Year. IAAF World Athlete of the Year. Track & Field Athlete of the Year. Track & Field Athlete of the Year. Laureus World Sportsman of the Year. Laureus World Sports Award for Sportsman of the Year. Bolt has stated that he intends to retire from athletics after the 2017 World Championships .. World Championships. IAAF World Championships in Athletics. 2017 World Championships. 2017 World Championships in Athletics
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