Task: Question Generation
Input (English): #1 return the  Battle of Pabaiskas 
#2 return the  Battle at Grunwald 
#3 return year of #1 
#4 return year of #2 
#5 return the  difference of #4 and  #3
Output (English): How many years passed between the Battle of Pabaiskas and the battle at Grunwald?