<prompt> Pedzisa mutsara unotevera: Pamitambo yeOlympic yeZhizha ya2012 muLondon, Joyce akaisa nguva yemasekonzi 25.28 muHeat 8 ye  <response>: 50 metres freestyle, ichimumanikidza kupinda mumakwikwi ekushambira nevamwe vaviri vanokwikwidza nzvimbo yegumi nenhanhatu uye yekupedzisira mumakwikwi e50 metres semi-fainari. Akurudzirwa nevanhu vomunharaunda, mukwikwidzi weBritish Amy Smith akakunda kumhanya kwekutanga nenguva ye24.82, achigumisa kutora chikamu kwaJoyce muchiitiko ichi. 