query: SELECT T2.title ,  T1.stars ,  T2.director ,  max(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID  =  T2.mID WHERE director != "null" GROUP BY director
question: For each director, are returning director's name together with title of movie directed it that received the most highest rating among all of their movies, and value of that rating. Ignore movies whose director is NULL.
query_toks: SELECT T2.title , T1.stars , T2.director , max ( T1.stars ) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID WHERE director ! = `` null '' GROUP BY director
query_toks_no_value: select t2 . title , t1 . stars , t2 . director , max ( t1 . stars ) from rating as t1 join movie as t2 on t1 . mid = t2 . mid where director ! = value group by director
question_toks: For each director, are returning director's name together with title of movie directed it that received the most highest rating among all of their movies, and value of that rating. Ignore movies whose director is NULL.