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