For each director, what is the title and score of their most poorly rated movie?
SELECT T2.title ,  T1.stars ,  T2.director ,  min(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID  =  T2.mID GROUP BY T2.director
Her yönetmen için, en kötü derecelendirilmiş filmlerinin başlığı ve puanı nedir?