High Quality Content by WIKIPEDIA articles! Dibora Monick Olga "Deborah" Gravenstijn (born August 20, 1974 in Tholen, Zeeland) is a Dutch judoka and First Lieutenant in the Royal Netherlands Air Force. She won a bronze medal in the class Women`s 57 kg at the 2004 Summer Olympics and a silver medal four years later at the same event at the 2008 Summer Olympics in Beijing.