Question: The 2006–07 Four Hills Tournament was a series of ski jumping competitions held in the traditional venues of Oberstdorf, Garmisch-Partenkirchen, Innsbruck and Bischofshofen, located in Germany and Austria, before the tournament started on which date, the World Cup leader was Simon Ammann, a Swiss ski jumper?
Sentence (from "Simon Ammann"): 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.
Relevant evidence: No