In what years did a movie receive a 4 or 5 star rating, and list the years from oldest to most recently?
return movies ;return ratings of  #1 ;return years of  #2 ;return #3 where  #2 is 4 ;return #3 where  #2 is 5 ;return #4 or #5 ;return #6 sorted by #3 from oldest to  most recently
['select', 'project', 'project', 'comparative', 'comparative', 'union', 'sort']