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