<prompt> David Realista Grachat akaberekwa musi wa 21 Ndira 1987 mutambi wePortugal, anokwikwidza mumakwikwi eS9. Akakwikwidza paMitambo yeParalympic yeZhizha mitatu, 2008 muBeijing, 2012 muLondon  <response>: uye muna 2016 muRio. Grachat akahwina menduru pazvose zviri zviviri zveEuropean uye zveNyika, uye anonyanya kuita 400m freestyle. 