SELECT T2.title ,  T2.director FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID  =  T2.mID WHERE T1.stars  >  (SELECT avg(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID  =  T2.mID WHERE T2.director  =  "James Cameron")
What are the titles and directors of the movies whose star is greater than the average stars of the movies directed by James Cameron?
[Schema (values) (types)]: | movie_1 |  Movie : mid (text) , title (number) , year (text) , director (number) | Reviewer : rid (text) , name (number) | Rating : rid (text) , mid (number) , stars (text) , ratingdate (number);