What type of details about marissa van der merwe  can be gathered from the following bio?  Bio: marissa stander -lrb- born august 30 , 1978 in pretoria -rrb- is a retired south african professional road cyclist . she has awarded two south african championship titles each in both road race and time trial , and later represented her nation south africa at the 2008 summer olympics . marissa also raced for the nation 's team before her official retirement in 2011 . marissa made her official debut at the 2007 all-africa games in algiers , algeria , where she won the silver medal in the women 's road race with a final time of 2:00:54 , finishing behind her teammate yolandi du toit . at the 2008 summer olympics in beijing , marissa qualified for the south african squad in the women 's road race by receiving one of the nation 's two available berths from the uci world cup . she successfully completed a grueling race with a thirty-fourth place effort in 3:33:17 , surpassing great britain 's sharon laws and the netherlands ' mirjam melchers by a few inches . on that same year , marissa earned the women 's time trial title in her first and only attempt at the south african championships in east london .

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