How many days after the Teutonic Knights were able to recover the eastern part of Prussia was Kneiphof taken?
return the  Teutonic Knights were able to recover the eastern part of Prussia ;return Kneiphof was  taken ;return day of #1 ;return day of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']