Complex sentence: The cathedral has been used from 2000 as a location for filming the first, second and sixth Harry Potter films, which has generated revenue and publicity, but caused some controversy amongst those who suggest that the theme of the films was unsuitable for a church.
Split into simpler sentences: The cathedral has been used from as a location for filming the first, second and sixth Harry Potter films. Filming caused some controversy amongst those who suggest that the theme of the films was unsuitable for a church.