Are there more people between 20and 29, or between 30 and 39?
return people ;return #1 between 20and 29 ;return #1 between 30 and  39 ;return number of  #2 ;return number of  #3 ;return which is highest of #4 ,  #5
['select', 'filter', 'filter', 'aggregate', 'aggregate', 'comparison']