How many more touchdowns did Denver have in the second quarter than the first?
return Denver ;return touchdowns of #1 ;return #2 in  the  second quarter ;return #2 in  the  first quarter ;return number of  #3 ;return number of  #4 ;return difference of #5 and  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']