Question: The person who finished third in the 1984 World's Strongest Man was born on what date?

Context articles: Eddie Hall
Robert Oberst
2004 World's Strongest Man
Geoff Capes
1981 World's Strongest Man
1984 World's Strongest Man
1979 World's Strongest Man
1980 World's Strongest Man
2007 World's Strongest Man
1985 World's Strongest Man

Edward Hall (born 15 January 1988) is an English professional strongman, notable for being the current World's Strongest Man and the only man to deadlift 500 kg under strongman rules.
 He has also won on multiple occasions both the UK's Strongest Man and England's Strongest Man titles.
 He is the 2017 World's Strongest Man and the current world record holder in the deadlift with straps.
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 2004 World's Strongest Man was the 27th edition of World's Strongest Man and was won by Vasyl Virastyuk from Ukraine.
 It was his first title after finishing third the previous year.
 Zydrunas Savickas from Lithuania finished second for the third year in a row.
 Originally Mariusz Pudzianowski from Poland finished third, but was later disqualified after testing positive for a banned substance, thus third place was given to Magnus Samuelsson from Sweden.
 The contest was held in Nassau, Bahamas.
 The qualifying heats saw a major format change, going from the traditional 5-6 man heats with the top 2 going to the finals.
 This year's format was a 12-man round-robin competition taking place over 5 days, with the top six going onto the finals.
Geoffrey Lewis Capes (born 23 August 1949) is a British former shot putter, strongman and professional Highland Games competitor.
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 1984 World's Strongest Man was the eighth edition of World's Strongest Man and was won by Jón Páll Sigmarsson from Iceland.
 It was his first title after finishing second the previous year.
 Ab Wolders from the Netherlands finished second and, 1983 champion Geoff Capes from the United Kingdom finished third.
 The contest was held at Mora, Sweden.
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 2007 World's Strongest Man was the 30th edition of World's Strongest Man and was won by Mariusz Pudzianowski from Poland.
 It was his fourth and record tying title.
 Sebastian Wenta from Poland finished second, and Terry Hollands from the United Kingdom finished third after finishing seventh the previous year.
 2006 champion Phil Pfister from the United States finished fourth.
 The contest was held in Anaheim, California.
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.