Indicate the release date of the film The Lion King directed by Roger Allers.
The Lion King refers to movie_title = 'The Lion King'; Roger Allers refers to director = 'Roger Allers';
SELECT T1.release_date FROM characters AS T1 INNER JOIN director AS T2 ON T1.movie_title = T2.name WHERE T2.director = 'Roger Allers' AND T1.movie_title = 'The Lion King'