 Complete the following phrase:  For the Winter Olympics, there are nine venues that have been or will be used for freestyle skiing. The first FIS Freestyle World Ski Championships was held at Tignes, France, in 1986. Two years later at the Winter Olympics in Calgary, the sport was included as a demonstration event though it took place at two different locations. Becoming an official Olympic sport in 1992, the venue chosen was at Tignes, host of the 1986 world championships. The 