Find the titles of items that received both a rating higher than 8 and a rating below 5.
SELECT T1.title FROM item AS T1 JOIN review AS T2 ON T1.i_id  =  T2.i_id WHERE T2.rating  >  8 INTERSECT SELECT T1.title FROM item AS T1 JOIN review AS T2 ON T1.i_id  =  T2.i_id WHERE T2.rating  <  5
Hem 8'den yüksek hem de 5'in altında bir derecelendirme alan öğelerin başlıklarını bulun.