What are the movie titles and average rating of the movies with the lowest average rating?
return movies ;return ratings of  #1 ;return average  of  #2 for each  #1 ;return #1 where #3 is  lowest ;return titles of  #4 ;return ratings of  #4 ;return average  of  #6 ;return #5 ,  #7
['select', 'project', 'group', 'superlative', 'project', 'project', 'aggregate', 'union']