How many yards longer was the second longest field goal over the second shortest field goal?
return field goals ;return yards of #1 ;return longest of #2 ;return #2 besides  #3 ;return longest of #4 ;return shortest of #2 ;return #2 besides  #6 ;return shortest of #7 ;return difference of #5 and  #8
['select', 'project', 'aggregate', 'discard', 'aggregate', 'aggregate', 'discard', 'aggregate', 'arithmetic']