According to the 2000 United States Census, which group is smaller in the county: people or families?
return the  2000 United States Census ;return people in  the  county of #1 ;return families in  the  county of #1 ;return number of  #2 ;return number of  #3 ;return which is the  lowest of #4 ,  #5
['select', 'project', 'project', 'aggregate', 'aggregate', 'comparison']