How many more field goals were made by Kasay than by Carpenter?
return Kasay ;return Carpenter ;return made field goals of #1 ;return made field goals of #2 ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic']