Database: movie_platform
Question: What is the average number of number of movies added to the lists of user 8516503? Indicate how many movies did he/she give a rating score of 5.
SQL: SELECT AVG(T3.list_movie_number) , SUM(CASE WHEN T1.rating_score = 5 THEN 1 ELSE 0 END) FROM ratings AS T1 INNER JOIN lists_users AS T2 ON T1.user_id = T2.user_id INNER JOIN lists AS T3 ON T2.user_id = T3.user_id WHERE T1.user_id = 8516503