 Complete the following phrase:  Olga Alida Divera Commandeur born 30 October 1958 is a Dutch television presenter and track and field athlete. She competed in the 400 metres hurdles at the 1984 Summer Olympics, but failed to reach the final. She won five national titles in this event in 1979, 1980, 1981, 1983 and 1984. She also won gold medals in the 800 metres at the 