Complex sentence: Although "Nazarín" is not one of Buñuel's most renowned films, it still holds a very high reputation; the acclaimed director Andrei Tarkovsky even named it one of his 10 favorite films.
Split into simpler sentences: Although "Nazarín" is not one of Buñuel's most renowned films, it still holds a very high reputation. The acclaimed director Andrei Tarkovsky named it one of his 10 favorite films.