How many years after the end of the first phase did the second phase end of the Mad War?
return the  end  of the   first phase  of  the    Mad War ;return the  end  of the   second phase  of  the    Mad War ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']