Find the title and score of the movie with the lowest rating among all movies directed by each director.
return directors ;return the   movies directed by #1 ;return the   ratings of #2 ;return the   lowest of #3 for each #1 ;return #2 where #3 is  #4 ;return the   titles of #5 ;return the   scores of #5 ;return #6 ,  #7
['select', 'project', 'project', 'group', 'comparative', 'project', 'project', 'union']