Premise: Superman (1978 film) . The film is a British , Swiss , Panamanian and American joint venture , produced by Warner Bros. , Film Export A.G. , Dovemead Limited and International Film Productions . Groundbreaking in its use of special effects and science fiction/fantasy storytelling , the film 's legacy presaged the mainstream popularity of Hollywood 's superhero film franchises .
Hypothesis: Superman was a movie.
Label: ENTAILMENT