How many more total field goal yard did Shaun Suisham make than Robbie Gould?
return Shaun Suisham ;return field goals of #1 ;return yard of #2 ;return sum of #3 ;return Robbie Gould ;return field goals of #5 ;return yard of #6 ;return sum of #7 ;return difference of #4 and  #8
['select', 'project', 'project', 'aggregate', 'select', 'project', 'project', 'aggregate', 'arithmetic']