Schema: the table movies with key movie_id, the table people with key person_id, and the table genres with key genre_id. The table has_genre implements a relationship between movies and genres and has the key (movie_id, genre_id). The table plays_role implements a relationship between movies and people and has the key (movie_id, person_id, role). Question 7 Complete the following SQL so that it returns records of the form: pid1, pid2, movie_id where pid1 and pid2 are identifiers of co-actors with roles in the romantic comedy with identifier movie_id. This should be a symmetric table so that if pid1, pid2, m is in the result, then so should be pid2, pid1, m. However, it should not include records where pid1 and pid2 are equal. Select R1.person_id as pid1, R2.person_id as pid2, M.movie_id as movie_id from >>