Task: Question Generation
Input (English): #1 return buildings 
#2 return floors of  #1 
#3 return number of  #2 
#4 return average of  #3 
#5 return maximum of  #3 
#6 return minimum of  #3 
#7 return #4 ,  #5 ,   #6
Output (English): What are the average, maximum, and minimum number of floors for all buildings?