<prompt> Nyorera kupfuurira kweiyi ndima - Kumitambo yeOlympic yeZhizha ya2012 muLondon, Sjöström akakwikwidza mumitambo mina yega, achisvika kuma semi fainari emamita makumi mashanu akasununguka  <response>: , 100 m freestyle uye 200 m freestyle, uye kupedza 4th mufainari ye100 m butterfly munguva ye57.17. Rekodhi yenyika yaSjöström yakaputswa munhangemutange iyi naDana Vollmer wokuUnited States. Muna 2015 zvisinei Sjöström akadzorera rekodhi yenyika nekuivandudza kaviri paWorld Championships muKazan. 