<prompt> Ngwala go tšwela pele bakeng sa serapa se - O ile a phenkgišana go FIS Freestyle World Ski Championships ka 1986 kua Tignes, moo a ilego a ba wa bohlano go acroski ballet ya ski. O thopile sefoka sa gauta go ski ballet go FIS Freestyle World Ski Championships 1991 kua Lake Placid. O thopile sefoka sa bobedi sa gauta ka go ski ballet ka FIS Freestyle World Ski Championships ka 1993 ka Altenmarkt-Zauchensee. Dipapading tša FIS Freestyle World Ski Championships ka 1995  <response>: Kua La Clusaz o ile a thopa sefoka sa silifera. 