<prompt> Ngwala tšwetšopele ya serapa se - De Silva o ile a swanelegela lebelo la basadi la 50 m ka mokgwa wa go kitima ka go itlhama  <response>: Dipapading tša Olimpiki tša Selemo tša 2004 kua Athene, ka go amogela lefelo la go ba le maemo a godimo go tšwa go FINA, ka nako ya go tsenela ya 28.48. O ile a hlohla batho ba bangwe ba šupago ba go rutha ka lebelo la bone, go akaretša le Melanie Slowing wa nywaga e 31 wa Guatemala. O ile a kitimela boemong bja bošupa ka dikotara tše pedi tša motsotswana ka morago ga Geraldine Arce wa Nicaragua ka nako ya 28,93. De Silva o ile a palelwa ke go fetela pele go seripa sa makgaolakgang, ka ge a be a beilwe maemong a masome hlano-pedi ka kakaretšo go tšwa go boramabelo ba 75 ka letšatši la mafelelo la dithalwa-pele. 