Given the question: What type of details about brad walker -lrb- athlete -rrb- can be gathered from the following bio? Bio: brad walker -lrb- born june 21 , 1981 in aberdeen , south dakota -rrb- is an american pole vaulter . he is the american recordholder and was the 2007 world champion in the event .
The answer is:
- sport - event - weight - caption - height - updated - birth date - name - image size - image