<prompt> Ramba uchinyora ndima iyi - London 2012 middleweight champion Claressa Shields ndiye aiva mukadzi weU.S. mutambi wetsiva kuti awedzere nzvimbo yake yeOlympic nekukunda mu quarterfinal paWorld Championships  <response>: muAstana, Kazakhstan. Antonio Vargas naGary Antuanne Russell ndivo chete vanhu vekuAmerica vakawana nzvimbo dzekuwedzera muchikwata chebhokisi pa2016 AIBA World Qualifying Tournament muBaku, Azerbaijan. 