Question: When was the German former ski jumper who led after the first day at "FIS Ski Flying World Championships 2002" born? 

Context articles: Peter Prevc
Veli-Matti Lindström
Sven Hannawald
FIS Ski Flying World Championships 1981
FIS Ski Flying World Cup
FIS Ski Flying World Championships
2013–14 FIS Ski Jumping World Cup
FIS Ski Flying World Championships 2002
Matti Hautamäki
FIS Ski Flying World Championships 1979

Peter Prevc (] ; born 20 September 1992) is a Slovenian ski jumper.
 He is one of the most successful contemporary athletes from Slovenia, having won the 2016 Ski Jumping World Cup, and finishing runner-up in 2014 and 2015.
 His other accomplishments include winning the 2016 Four Hills Tournament; the 2016 Ski Flying World Championships; three consecutive Ski Flying World Cup titles (2014, 2015 and 2016); silver and bronze medals at the 2014 Winter Olympics; silver and bronze at the 2013 Ski Jumping World Championships; bronze at the 2014 Ski Flying World Championships; and bronze with the Slovenian national team at the 2011 Ski Jumping World Championships.
Veli-Matti Lindström (born 15 November 1983) is a Finnish former ski jumper.
 His career best achievement was a silver medal at the 2002 Winter Olympics in Salt Lake City in the team large hill event.
 He also won a silver medal in the team event at the 2004 Ski Flying World Championships in Planica, as well as two championships at the Ski Flying World Cup in Planica in the team event in 2002 and 2003.
Sven Hannawald (born 9 November 1974) is a German former ski jumper, motor racing driver, and footballer.
 In ski jumping he competed from 1992 to 2004, with his career best achievement being the winner of the 2002 Four Hills Tournament and becoming the only athlete in history to win all four events in the same tournament.
 He also finished runner-up twice in the World Cup season, won four medals at the Ski Jumping World Championships, as well as three medals each at the Winter Olympics and Ski Flying World Championships.
 After retiring from ski jumping, Hannawald played football for Kreisliga club TSV Burgau, and drove for Callaway Competition in the ADAC GT Masters series.
The FIS Ski Flying World Ski Championships 1981 took place in Oberstdorf, West Germany for the second time.
 Oberstdorf hosted the FIS Ski Flying World Championships in 1973.
The FIS Ski Flying World Cup is an annual competition in ski flying, contested as part of the FIS Ski Jumping World Cup and organized by International Ski Federation.
 It should not be confused with the FIS Ski Flying World Championships, which are a separate one-off event contested biennially during the World Cup season, but with points not counting towards it.
The FIS Ski Flying World Championships is a ski flying event organised by the International Ski Federation and held every two years.
 The event takes place on hills much larger than ski jumping hills, with the K-point set between 185 m and 200 m .
 Unlike ordinary ski jumping, the Ski Flying World Champion is determined after four jumps.
 40 jumpers qualify for the competition and jump the first round, 10 are eliminated, and the 30 remaining jumpers compete in the last three rounds.
 The person with most points combined after four jumps is declared the World Champion.
 In 2004, the FIS introduced a team event between national teams of four jumpers, with two jumps each.
The 2013/14 FIS Ski Jumping World Cup was the 35th World Cup season in ski jumping for men, the 17th official World Cup season in ski flying and the 3rd season for ladies.
 It begun on 23 November 2013 in Klingenthal, Germany and ended on 23 March 2014 in Planica, Slovenia.
 A break took place during the season to accommodate the ski jumping event of the 2014 Winter Olympics in Sochi.
 From 13 to 16 March 2014, FIS Ski Flying World Championships 2014 took place in Harrachov, Czech Republic.
The FIS Ski Flying World Ski Championships 2002 took place on 9 and 10 March 2002 at Čerťák in Harrachov, Czech Republic for the third time.
 Harrachov hosted the championships previously in Czechoslovakia in 1983 and 1992.
 This marked the first time the event took place on separate days.
 Germany's Sven Hannawald led after the first day, but the results were allowed to stand after two jumps after weather cancelled the final two jumps on the second day.
 Hannawald became the first repeat winner of the championships as a result.
 Finland's Matti Hautamäki had the longest jump of the competition with his first-round jump of 202.5 m.
Matti Antero Hautamäki (] ; born 14 July 1981) is a Finnish former ski jumper who competed from 1997 to 2012.
 He is one of Finland's most successful ski jumpers, having won sixteen individual World Cup competitions; multiple medals at the Winter Olympics, Ski Jumping World Championships, and Ski Flying World Championships; the Nordic Tournament twice; and four ski flying world records.
 Together with Thomas Morgenstern, Hautamäki currently holds the hill record in Harrachov with a distance of 214.5 m , set on 9 March 2002.
The FIS Ski Flying World Ski Championships 1979 took place in Planica, Yugoslavia for the second time, between 15-18 March 1979.
 Planica hosted the FIS Ski Flying World Championships in 1972.