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