Task: Question Generation
Input (English): #1 return Wedego Bugenhagen gained control of Grimmen 
#2 return Mecklenburg army under Albert II succeeded in  storming the  town 
#3 return year of #1 
#4 return year of #2 
#5 return difference of #3 and  #4
Output (English): How many years, Wedego Bugenhagen, gained control of Grimmen until Mecklenburg army under Albert II succeeded in storming the town?