Task: Question Decomposition
Input (English): question: How many people difference was it between the smallest and the largest estimates of Tenochtitlan's size?
Output (English): #1 return Tenochtitlan 
#2 return size of #1 
#3 return estimates of #2 
#4 return lowest of #3 
#5 return highest of #3 
#6 return difference of #5 and  #4