Question: The 1981 World's Strongest Man, was which edition of World's Strongest Man, and was won by Bill Kazmaier from the United States, Geoffrey Lewis Capes, a former shot putter from the UK, and finished second after finishing third the previous year, a strongman and professional Highland Games competitor
Context: Robert Oberst (born December 20, 1984) is an American professional strongman who was awarded his "Pro Card" at the 2012 Dallas Europa Amateur Strongman Competition.  He is a yearly competitor of the World's Strongest Man including the 2013 World's Strongest Man, 2014 World's Strongest Man, 2015 World's Strongest Man and the 2016 World's Strongest Man competitions. The 1979 World's Strongest Man was the third edition of World's Strongest Man and was won by Don Reinhoudt from the United States.  It was his first title after finishing second the previous year.  Lars Hedlund from Sweden finished second after finishing third the previous year, and Bill Kazmaier also from the United States finished third.  The contest was held at the Universal Studios, California. The 1980 World's Strongest Man was the fourth edition of World's Strongest Man and was won by Bill Kazmaier from the United States.  It was his first title after finishing third the previous year.  Lars Hedlund from Sweden finished second after finishing second the previous year, and Geoff Capes from the United Kingdom finished third.  Defending champion Don Reinhoudt withdrew from the competition due to injury; this would be his final World's Strongest Man. The World Muscle Power Classic (WMPC) (sometimes known as the World Muscle Power Championships) was one of the most enduring annual strongmen competitions, running for twenty years and in that time attaining the position of the second most prestigious strongman contest in the world, after the World's Strongest Man.  It was notable for that reason and for the quality of the strength athletes it attracted, which included every winner of the World's Strongest Man competition from 1980 onwards including Jón Páll Sigmarsson, Geoff Capes and Bill Kazmaier from the 1980s right up to the five time WSM champion Mariusz Pudzianowski, who was never able to capture the WMPC title. The 1985 World's Strongest Man was the ninth edition of World's Strongest Man and was won by Geoff Capes from the United Kingdom.  It was his second title after finishing third the previous year.  1984 champion Jón Páll Sigmarsson from Iceland finished second and Cees de Vreugd from the Netherlands finished third.  The contest was held at Cascais, Portugal. The 1990 World's Strongest Man was the 13th edition of World's Strongest Man and was won by Jón Páll Sigmarsson from Iceland.  It was his fourth title after finishing third the previous year, and his last as he did not compete in any future event before his 1993 death.  O.D. Wilson from the United States finished second, and Ilkka Nummisto from Finland finished third after finishing sixth the previous year.  The contest was held in Joensuu, Finland. The 1981 World's Strongest Man was the fifth edition of World's Strongest Man and was won by Bill Kazmaier from the United States.  It was his second title.  Geoff Capes from the United Kingdom finished second after finishing third the previous year, and Dave Waddington from the United States finished third.  The contest was held at Magic Mountain, California. The World Strongman Challenge was one of the most enduring annual strongmen competitions, running in various guises for twenty years, with only two years break.  In that time it attained the position of one of the most prestigious strongman contest in the world, after the World's Strongest Man and the World Muscle Power Classic.  As with its two international counterparts it attracted the top quality strength athletes of its era, which included every winner of the World's Strongest Man competition from 1980 onwards including Jón Páll Sigmarsson, Geoff Capes and Bill Kazmaier from the 1980s right up to the current WSM champion Žydrūnas Savickas. Geoffrey Lewis Capes (born 23 August 1949) is a British former shot putter, strongman and professional Highland Games competitor. The 1983 World's Strongest Man was the seventh edition of World's Strongest Man and was won by Geoff Capes from the United Kingdom.  It was his first title.  Jón Páll Sigmarsson from the Iceland finished second, and Simon Wulfse from the Netherlands third.  The winner of the three previous competetitions, Bill Kazmaier, was not invited to compete again in this year.  The contest was held at Christchurch, New Zealand.  The title of the competition, formerly "World's Strongest Men", was changed to the current title for this competition.
Answer: fifth