Which group was smaller in percent from the county: under the age of 18 or 18 to 24?
return group from  the  county ;return #1 that is under the  age of 18 ;return #1 that is from  the  ages of 18 to 24 ;return percent of #2 ;return percent of #3 ;return which is smaller of #4 ,  #5
['select', 'filter', 'filter', 'project', 'project', 'comparison']