week date opponent result attendance
week
date
opponent
result
attendance
number
number parsed year month day
raw home
result number number1 number2
number
number date text score number
1 september 13, 1987 san diego chargers w 20-13 56940
what is the difference in attendance from when the kansas city chiefs lost to the seattle seahwaks to when the won against them at the end of 1987 ?
WP VBD-AUX DT NN IN NN IN WRB DT NNP NNP NNPS VBD TO DT NNP NNP TO WRB DT VBN IN PRP IN DT NN IN CD .