For each director, how many reviews have they received?
SELECT count(*) ,  T1.director FROM Movie AS T1 JOIN Rating AS T2 ON T1.mID  =  T2.mID GROUP BY T1.director
SELECT count(*) ,  T1.director FROM Movie AS T1 JOIN Rating AS T2 ON T1.mID  =  T2.mID GROUP BY T1.director
[{'count(*)': 2, 'director': None}, {'count(*)': 2, 'director': 'James Cameron'}, {'count(*)': 2, 'director': 'Robert Wise'}, {'count(*)': 5, 'director': 'Steven Spielberg'}, {'count(*)': 3, 'director': 'Victor Fleming'}]