What are the three countries that the least players are from?
return players ;return country of #1 ;return number of  #1 for each #2 ;return #2 where #3 is lowest ;return #2 besides  #4 ;return #5 where #3 is lowest ;return #5 besides  #6 ;return #7 where #3 is lowest ;return #4 ,  #6 ,   #8
['select', 'project', 'group', 'superlative', 'discard', 'superlative', 'discard', 'superlative', 'union']