How many yards longer was the longest offensive touchdown when compared to the longest defensive touchdown?
return offensive touchdowns ;return defensive touchdowns ;return yards of #1 ;return yards of #2 ;return the  longest of #3 ;return the  longest of #4 ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic']