What are the titles and directors of the movies whose star is greater than the average stars of the movies directed by James Cameron?
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")
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")
[{'title': 'Snow White', 'director': None}, {'title': 'Avatar', 'director': 'James Cameron'}]