The armistace concluded by King Richard ended how many years after Herny VI was elected King of the Romans?
return Herny VI was  elected King  of the  Romans ;return the  armistace concluded by King  Richard ended ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']