Title: The Phantom of the Opera (1998 film)
Content:  The Phantom of the Opera (Il fantasma dell'opera) is a 1998 Italian horror film directed by Dario Argento, adapted from the 1910 novel Le Fantôme de l'Opéra by Gaston Leroux. However, there are many differences between the book and the film (the biggest being that the Phantom is not disfigured).
Title: The Phantom of the Opera (1989 film)
Content:  The Phantom of the Opera is a 1989 American horror film directed by Dwight H. Little and based on Gaston Leroux's 1910 novel of the same name. The film is an updated and gorier version of Leroux's classic tale, and stars Robert Englund as the Phantom. The film was a critical and commercial failure.
Title: The Phantom of the Opera (1962 film)
Content:  The Phantom of the Opera is a 1962 British horror film directed by Terence Fisher, a loose adaptation of the 1910 novel Le Fantôme de l'Opéra by Gaston Leroux. The film was made by Hammer Film Productions but performed unsuccessfully at the box office.
Title: Phantom of the Opera (1976 musical)
Content:  Phantom of the Opera is a 1976 musical with book and lyrics by Ken Hill. It is the first musical adaptation of the 1910 novel The Phantom of the Opera by Gaston Leroux, about the hideously disfigured Phantom's amorous obsession with the magnificent, naïve singer, Christine. Hill wrote the original English lyrics to the music of Verdi, Gounod, Offenbach, Mozart, Weber, Donizetti, and Boito.
Title: The Phantom of the Opera (1986 musical)
Content:  Inspired in part by an earlier musical version of the same story by Ken Hill, Lloyd Webber's score is sometimes operatic in style but maintains the form and structure of a musical throughout. The full-fledged operatic passages are reserved principally for subsidiary characters such as Andre and Firmin, Carlotta, and Piangi. They are also used to provide the content of the fictional operas that are taking place within the show itself, viz., Hannibal, Il Muto, and the Phantom's masterwork, Don Juan Triumphant. "Here, Lloyd Webber pastiched various styles from the grand operas of Meyerbeer through to Mozart and even Gilbert and Sullivan." These pieces are often presented as musical fragments, interrupted by dialogue or action sequences in order to clearly define the musical's "show within a show" format. The musical extracts from the Phantom's opera, "Don Juan Triumphant", heard during the latter stages of the show, are dissonant and modern—"suggesting, perhaps, that the Phantom is ahead of his time artistically".
Title: Phantom of the Opera (1976 musical)
Content:  Opéra Garnier in the late 19th century. Consequently, he discarded the modern score by Ian Armit and wrote original English lyrics that told Leroux’s tale. By placing them to opera arias by Verdi, Gounod, Offenbach, Mozart, Weber, Donizetti, and Boito, he created a musical that reflected the era in which the original novel was written. This updated version of The Phantom of the Opera was produced in a joint production by the Newcastle Playhouse and the Theatre Royal Stratford East, and premiered at the Newcastle Playhouse on 3 April 1984, before shortly moving to the Theatre Royal Stratford East. In 
Title: The Phantom of the Opera at the Royal Albert Hall
Content:  The Phantom of the Opera at the Royal Albert Hall is a 2011 British concert film adaptation of Andrew Lloyd Webber's 1986 musical The Phantom of the Opera, which in turn was based on the 1910 French novel Le Fantôme de l'Opéra by Gaston Leroux. To celebrate the 25th anniversary of the musical, three special performances on Saturday 1 October 2011 at 7.30pm and Sunday 2 October 2011 at 1.30pm and 7.00pm were filmed at the Royal Albert Hall, the third of which was screened live worldwide on 2 October 2011. For further releases, footage from all three performances were edited together.
Title: The Phantom of the Opera (2004 film)
Content:  The Phantom of the Opera is a 2004 musical romantic drama film based on Andrew Lloyd Webber's 1986 musical of the same name, which in turn is based on the 1910 French novel Le Fantôme de l'Opéra by Gaston Leroux. Produced and co-written by Lloyd Webber and directed by Joel Schumacher, it stars Gerard Butler in the title role, with Emmy Rossum, Patrick Wilson, Miranda Richardson, Minnie Driver, and Jennifer Ellison in supporting roles. The film was announced in 1989, although production did not start until 2002 due to Lloyd Webber's divorce and Schumacher's busy career. It was shot entirely at Pinewood Studios, with scenery created with miniatures and computer graphics. Rossum, Wilson and Driver had singing experience, but Butler had none and was provided with music lessons prior to filming. The Phantom of the Opera grossed $154.6 million worldwide, and received neutral reviews from critics, but was well-received by audiences. Critics praised the visuals and acting, particularly the performances of Butler and Rossum, but criticized the writing, directing and unnecessary deviations from the stage version.
Title: Adaptations of The Phantom of the Opera
Content:  (1979) by Gene Traylor. ; The Phantom of the Opera: Or the Passage of Christine (1986) with book by Kathleen Masterson and music by David Bishop. ; The Phantom of the Opera (1986): Musical composed by Andrew Lloyd Webber with lyrics by Charles Hart and Richard Stilgoe. This musical was adapted into a film in 2004 directed by Joel Schumacher. A 25th anniversary staging of the musical was also filmed. (See above). ; The Phantom of the Opera (a.k.a. The American Phantom of the Opera: A Love Story) (1987) by Helen Grigal (book and lyrics) and Dr. Walter Anderson (music) Produced by the Oregon Ridge Dinner Theater in cooperation with the 
Title: The Phantom of the Opera
Content:  The Phantom of the Opera (French: Le Fantôme de l'Opéra) is a novel by French author Gaston Leroux. It was first published as a serial in Le Gaulois from 23 September 1909 to 8 January 1910, and was released in volume form in late March 1910 by Pierre Lafitte. The novel is partly inspired by historical events at the Paris Opera during the nineteenth century, and by an apocryphal tale concerning the use of a former ballet pupil's skeleton in Carl Maria von Weber's 1841 production of Der Freischütz. It has been successfully adapted into various stage and film adaptations, most notable of which are the 1925 film depiction featuring Lon Chaney, and Andrew Lloyd Webber's 1986 musical.

Question: What genre is Phantom of the Opera?
Answer: horror film.
horror movie.