question: How many years after the Battle of Nieuwpoort ocurred did the area obtain city rights from County Philip of Flanders?
#1 return the  Battle of Nieuwpoort ocurred 
#2 return the  area did obtain city rights from  County Philip of Flanders 
#3 return year of #1 
#4 return year of #2 
#5 return difference of #4 and  #3