Task: Question Generation
Input (English): #1 return Arabs 
#2 return Turks 
#3 return troops of #1 
#4 return troops of #2 
#5 return #3 at  Benghazi 
#6 return #4 at  Benghazi 
#7 return #3 at  Derna 
#8 return #4 at  Derna 
#9 return number of  #5 
#10 return number of  #6 
#11 return number of  #7 
#12 return number of  #8 
#13 return sum of #9 and  #10 
#14 return sum of #11 and  #12 
#15 return the  difference of #14 and  #13
Output (English): Compared to the amount of troops the Arabs and Turks had at Benghazi how many less did they have at Derna?