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

full_context: Document 1: FIS Ski Flying World Championships 2002: 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.
Document 2: FIS Ski Flying World Championships 1979: 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.
Document 3: FIS Ski Flying World Championships: 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.
Document 4: FIS Nordic World Ski Championships 2001: The FIS Nordic World Ski Championships 2001 took place February 15–25, 2001 in Lahti, Finland for a record sixth time, previous events being held in 1926, 1938, 1958, 1978 and 1989. These championships also saw the most event changes since the 1950s with the 5 km women and 10 km men's events being discontinued, the 10 km women and 15 km men's events return to their normal status for the first time since the 1991 championships, the debut of a combined pursuit as a separate category (5 km + 5 km for women, 10 km + 10 km for men), the addition of the individual sprint race for both genders, and the debut of the ski jumping team normal hill event. Extremely cold weather (-23 C ) cancelled the women's 30 km event. The biggest controversy occurred when a doping scandal hit the host nation of Finland, resulting in six disqualifications. This would serve as a prelude to further doping cases in cross country skiing at the Winter Olympics in Salt Lake City the following year.
Document 5: FIS Ski Flying World Championships 1981: 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.
Document 6: Sven Hannawald: 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.
Document 7: Gregor Schlierenzauer: Gregor Schlierenzauer (] ; born 7 January 1990) is an Austrian ski jumper. He is one of the sport's most successful athletes of all time, having won the Ski Jumping World Cup, Four Hills Tournament, and Nordic Tournament twice each; the Ski Flying World Cup three times; as well as four medals at the Winter Olympics, five at the Ski Flying World Championships, and twelve at the Ski Jumping World Championships.
Document 8: Peter Prevc: 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.
Document 9: Matti Hautamäki: 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.
Document 10: FIBT World Championships 2000: The FIBT World Championships 2000 took place in Altenberg, Germany (men's bobsleigh), Winterberg, Germany (women's bobsleigh), and Igls, Austria (men's and women's skeleton). Altenberg hosted the championship event for the fourth time, doing so previously in 1991 (bobsleigh), 1994 (skeleton), and 1999 (skeleton). Winterberg hosted the championship event for the second time, doing so previously in 1995 (bobsleigh). Igls hosted the championship for the fifth time, doing do previously in 1935 (two-man) and 1963, 1991 (skeleton), and 1993 (bobsleigh). Two-woman bobsleigh and women's skeleton debuted at these championships.
Document 11: Simon Ammann: Simon Ammann ( ; born 25 June 1981) is a Swiss ski jumper. He is one of the most successful athletes in the history of the sport, having won four individual Winter Olympic gold medals, in 2002 and 2010, and is the only ski jumper to have achieved the gold double–double at the Winter Olympics. Additionally he won the 2007 Ski Jumping World Championships; the 2010 Ski Flying World Championships; the 2010 Nordic Tournament; and the 2010 Ski Jumping World Cup.
Document 12: 2013–14 FIS Ski Jumping World Cup: 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.
Document 13: 2000 Swedish Rally: The 49th International Swedish Rally was the second round of 2000 FIA World Rally Championship. The event took place between 11 and 13 February 2000. Marcus Grönholm won his first WRC rally. Tommi Mäkinen finished second and continued in the lead of the championship after two rounds.
Document 14: Sven Müller (racing driver): Sven Müller (born February 7, 1992 in Mainz) is a German racing driver currently racing for Porsche Motorsport as a factory driver. He is the reigning Porsche Supercup champion during 2017.
Document 15: Sven Scheuer: Scheuer joined Bayern Munich in 1988, and spent 11 years with the club, serving as backup goalkeeper to Raimond Aumann until 1994 and later Oliver Kahn. He usually shared this role with another 'keeper, including Uwe Gospodarek (1991–1994), Michael Probst (1994–1996) and Bernd Dreher (1996–1999). He made 20 appearances in the Bundesliga, half of which came in the 1994–95 season, and won five league titles, plus the UEFA Cup in 1996 and the German Cup in 1998. He also played regularly for Bayern's reserve team, in the Oberliga Bayern and Regionalliga Süd.
ground_truth: 9 November 1974