How many more points were earned by field goal kicks in the third quarter than in the second quarter?
return field goals ;return points of #1 ;return #2 in  the  third quarter ;return #2 in  the  second quarter ;return sum of #3 ;return sum of #4 ;return difference of #5 and  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']