Task: Question Generation
Input (English): #1 return the  beginning of the   war over the    Pescadores 
#2 return the  Battle of Liaoluo Bay 
#3 return year of #1 
#4 return year of #2 
#5 return difference of #4 and  #3
Output (English): How many years passed between the beginning of the war over the Pescadores and the Battle of Liaoluo Bay?