pick # nfl team player position college
pick #
nfl team
player
position
college
number
number text text text text
183 tampa bay buccaneers parnell dickinson quarterback mississippi valley state
what is the average number of defensive backs chosen in the seventh round ?
WP VBD-AUX DT JJ NN IN JJ NNS VBN IN DT JJ NN .
5
select count ( * ) from w where c4 = 'defensive back'