 Complete the following phrase:  Storhamar Ishall is the regular training venue for Storhamar ILs figure skating group. Between them, the two venues have hosted the Norwegian Figure Skating Championships three times: Storhamar Ishall in 1983, and the Olympic Amphitheatre in 2005 and 2011. In October 1993, the Olympic Amphitheatre hosted Piruetten 1993, a pre-Olympic figure skating event. Although featuring stars such as Nancy Kerrigan, it only attracted 150 spectators. The venue has hosted the ISU Junior Grand Prix in 19992000 and 200001 and the World Junior Figure Skating Championships in 