How many yards longer was the field goal in the second half than the first half?
return the  first half  ;return the  second half  ;return field goal of #1 ;return field goal of #2 ;return yards of #3 ;return yards of #4 ;return the  difference of #6 and  #5
['select', 'select', 'project', 'project', 'project', 'project', 'arithmetic']