Find the average rating star for each movie that are not reviewed by Brittany Harris.
SELECT mID ,  avg(stars) FROM Rating WHERE mID NOT IN (SELECT T1.mID FROM Rating AS T1 JOIN Reviewer AS T2 ON T1.rID  =  T2.rID WHERE T2.name  =  "Brittany Harris") GROUP BY mID
Brittany Harris tarafından gözden geçirilmeyen her film için ortalama derecelendirme yıldızını bulun.