Complex sentence: In 1958, the story was made into the film "The Inn of the Sixth Happiness", starring Ingrid Bergman; although the film was produced by a Hollywood company (Twentieth Century Fox) it was filmed entirely in North Wales and England.
Split into simpler sentences: In 1958, the story was made into the Hollywood film "The Inn of the Sixth Happiness", starring Ingrid Bergman. The film Inn of the Sixth Happiness was filmed entirely in North Wales and England.