Which household had a higher median income, those with single adults with no dependent children or those who were couples with no dependent children?
return households ;return #1 that were single adults with no dependent children  ;return #1 that were couples with no dependent children  ;return the  median income of #2 ;return the  median income of #3 ;return which is higher of #4 ,  #5
['select', 'filter', 'filter', 'project', 'project', 'comparison']