For each director, what is the title and score of their most poorly rated movie?
return directors ;return movies of #1 ;return scores of #2 ;return the  lowest of #3 for each #1 ;return #2 where #3 is equal to #4 ;return titles of #5 ;return #6 ,  #4
['select', 'project', 'project', 'group', 'comparative', 'project', 'union']