Please answer the following question: Facts: - sport: track and field - event: 400 metres hurdles - country: jamaica - birth date: 9 may 1992 - name: ristananna tracey Based on these bullet points, write a short biography describing the life of ristananna tracey .
A:
ristananna tracey -lrb- born 9 may 1992 -rrb- is a jamaican sprinter .she competed in the 400 metres hurdles event at the 2015 world championships in athletics in beijing , china .