Show the location name and code with the least documents.
return locations ;return documents of #1 ;return number of  #2 for each #1 ;return #1 where #3 is lowest ;return location name of #4 ;return location code of #4 ;return #5 ,  #6
['select', 'project', 'group', 'superlative', 'project', 'project', 'union']