Complex sentence: The film is based (not always loyal) on the novel The Gambler by Fyodor Mikhailovich Dostoevsky, although the film follows more a love story plot that a gambling adiction plot.
Split into simpler sentences: The film is based (not always loyal) on the novel The Gambler by Fyodor Mikhailovich Dostoevsky. Although the film follows more a lovestory plot that a gambling adiction plot.