Complex sentence: In the USA, the film was originally to be released as an MPAA R-rated film with graphic violent scenes however, the studio wished to have a more marketable PG-13 rating and the film was edited and released as a PG-13 film.
Split into simpler sentences: In the USA, the film was originally to be released as an MPAA R-rated film with graphic violent scenes. However, the studio wished to have a more marketable PG-13 rating, and the film was edited and released as a PG-13 film.