what films won oscars for best picture best director and best actor?
return films ;return oscars of #1 ;return #1 where  #2 is best picture ;return #1 where  #2 is best director ;return #1 where  #2 is best actor ;return #1 in  both  #3 and #4 ;return #1 in  both  #6 and #5
['select', 'project', 'comparative', 'comparative', 'comparative', 'intersection', 'intersection']