Which group for households in the city is smaller: under the age of 18 or 18 to 24?
return households in  the  city ;return #1 that are under the  age of 18 ;return #1 that are from  18 to 24 ;return number of  #2 ;return number of  #3 ;return which is the  lowest of #4 ,  #5
['select', 'filter', 'filter', 'aggregate', 'aggregate', 'comparison']