As of 2000, which group for households is smaller: married couples living together or made up of individuals?
return households ;return #1 in  2000 ;return #2 that are married couples living together ;return #2 that are made up of individuals ;return number of  #3 ;return number of  #4 ;return which is the  lowest of #5 ,  #6
['select', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'comparison']