Question: Provide the titles, main characters, and associated songs of the movies directed by Wolfgang Reitherman in 1977.
SQL: SELECT T1.movie_title, T2.hero, T2.song FROM movies_total_gross AS T1 INNER JOIN characters AS T2 ON T1.movie_title = T2.movie_title INNER JOIN director AS T3 ON T1.movie_title = T3.name WHERE T3.director = 'Wolfgang Reitherman' AND SUBSTR(T1.release_date, LENGTH(T1.release_date) - 3, LENGTH(T1.release_date)) = '1977'