Germany’s surprise 4×100 metres bronze medal has made team member Alexandra Burghardt only the seventh athlete to get silverware at summer and winter Games. The bronze for the 30-year-old on Friday came two years after she won two-woman bobsleigh silver in Beijing. She ran in the relay because Sophia Jung was nursing muscular problems. “Yes, my story is really special, this was not a plan. The Winter Olympics was just a try, and it turned out pretty well,” she said. “This medal was our dream and two years ago, at the world championships, we saw what was possible with the relay with the bronze …