question: Were there more people between 20 and 40 or between 40 and 60?
#1 return people 
#2 return #1 between 20 and  40 
#3 return #1 between 40 and  60 
#4 return number of  #2 
#5 return number of  #3 
#6 return which is highest of #4 ,  #5