How many years after the capture of the king at the Battle of Poitiers did John de Montfort return to Brittany?
return the  captures of the   king at the Battle of  Poitiers ;return John de Montfort did return to Brittany ;return year of #1 ;return year of #2 ;return difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']