<prompt> Feleletša polelwana e latelago: O thopile sefoka sa silifera ka go bapala ballet ya go thelela godimo ga dithaba ski ballet go FIS Freestyle World Ski Championships 1997. O ile a ba a phenkgišana ka 1989, 1991 le  <response>: Ditlhamo tša lefase tša 1995. 