<prompt> Pedzisa mutsara unotevera: Campbell aiva nhengo yechikwata cheAustralia chakakunda menduru yegoridhe mumakwikwi e4 × 100 metres freestyle relay paMitambo yeOlympic yeZhizha ya2012 muLondon. Mu  <response>: 50 metres freestyle yevakadzi iye nehanzvadzi yake Bronte vakashambira mumhepo imwe chete, vachipedza wechitatu uye wechipiri zvichiteerana, uye vachikodzera kuenda kuma semi fainari munzvimbo yegumi neyepfumbamwe zvichiteerana. 