How many yards difference was Michael Pittman’s last touchdown run compared to his first?
return Michael Pittman ;return touchdown runs of #1 ;return last of #2 ;return first of #2 ;return yards of #3 ;return yards of #4 ;return difference of #5 and  #6
['select', 'project', 'aggregate', 'aggregate', 'project', 'project', 'arithmetic']