Task: Question Generation
Input (English): #1 return western New Mexico 
#2 return the  Navajo of #1 
#3 return #2 that were killed during the  expedition 
#4 return #2 that were captured during the  expedition 
#5 return number of  #3 
#6 return number of  #4 
#7 return the  difference of #5 and  #6
Output (English): How many more Navajo were killed during the expedition against the Navajo of western New Mexico compared to those who were captured?