Were there more people between 20 and 40 or between 40 and 60?
return people ;return #1 between 20 and  40 ;return #1 between 40 and  60 ;return number of  #2 ;return number of  #3 ;return which is highest of #4 ,  #5
['select', 'filter', 'filter', 'aggregate', 'aggregate', 'comparison']