Find the titles of items that received both a rating higher than 8 and a rating below 5.
return items ;return ratings of #1 ;return #1 where #2 is higher than 8 ;return #1 where #2 is lower than 5 ;return #1 in  both #3 and  #4 ;return titles of #5
['select', 'project', 'comparative', 'comparative', 'intersection', 'project']