Which group from 2011-15 had a lower median income: male full-time workers or females?
return groups from  2011-15 ;return #1 that are male full-time workers ;return #1 that are females ;return median income of #2 ;return median income of #3 ;return which is lower of #4 ,  #5
['select', 'filter', 'filter', 'project', 'project', 'comparison']