<prompt> Ngwala tšwetšopele ya serapa se - David Realista Grachat yo a belegwego ka la 21 Pherekgong 1987 ke mo-para-swimmer wa Portugal, yo a phenkgišanago ka ditiragalo tša S9. O ile a phadišana ka Dipapading tše tharo tša Paralympic tša Selemo, 2008 kua Beijing, 2012 kua London  <response>: le 2016 kua Rio. Grachat o thopile dimetale maemong a Yuropa le a Lefase, gomme o ithutetše go kitima ka mokgwa wa go kitima wa go kitima wa 400 m. 