How many more yards was Robbie Gould's longest field goal over his shortest?
return Robbie Gould ;return field goals of #1 ;return longest of #2 ;return shortest of #2 ;return yards of #3 ;return yards of #4 ;return difference of #5 and  #6
['select', 'project', 'aggregate', 'aggregate', 'project', 'project', 'arithmetic']