tie no home team score away team attendance
tie no
home team
score
away team
attendance
number
number number1 number2
number parsed year month day
number text score text date
1 chesterfield 1-0 nottingham forest 15 february 1997
what is the difference of points in the game between birmingham city and wrexham ?
WP VBD-AUX DT NN IN NNS IN DT NN IN NNP NNP CC NNP .
2
select abs ( c3_number1 - c3_number2 ) from w where c2 = 'birmingham city' and c4 = 'wrexham'