Question: Both The Turn of the Screw and Martha are categorized as what genre?

full_context: Document 1: Spieloper: In the 19th century, Spieloper ('opera play') was understood to mean a light opera genre, developed from Singspiel. Works typical of the genre include those by Albert Lortzing, such as "Zar und Zimmermann", and Otto Nicolai's "The Merry Wives of Windsor". A key difference between Spieloper and Singspiel on the one hand, and opera buffa on the other, is that the two former genres contain spoken dialogues instead of recitatives, which is why Conradin Kreutzer's "Das Nachtlager in Granada" and Friedrich von Flotow's "Martha" do not belong to this genre.
Document 2: The Marriage of Figaro: The Marriage of Figaro (Italian: Le nozze di Figaro , ] ), K. 492, is an opera buffa (comic opera) in four acts composed in 1786 by Wolfgang Amadeus Mozart, with an Italian libretto written by Lorenzo Da Ponte. It premiered at the Burgtheater in Vienna on 1 May 1786. The opera's libretto is based on a stage comedy by Pierre Beaumarchais, "La folle journée, ou le Mariage de Figaro" ("The Mad Day, or The Marriage of Figaro"), which was first performed in 1784. It tells how the servants Figaro and Susanna succeed in getting married, foiling the efforts of their philandering employer Count Almaviva to seduce Susanna and teaching him a lesson in fidelity.
Document 3: A Midsummer Night's Dream (opera): A Midsummer Night's Dream, Op. 64, is an opera with music by Benjamin Britten and set to a libretto adapted by the composer and Peter Pears from William Shakespeare's play, "A Midsummer Night's Dream". It was premiered on 11 June 1960 at the Aldeburgh Festival, conducted by the composer and with set and costume designs by Carl Toms. Stylistically, the work is typical of Britten, with a highly individual sound-world – not strikingly dissonant or atonal, but replete with subtly atmospheric harmonies and tone painting. The role of Oberon was composed for the countertenor Alfred Deller. Atypically for Britten, the opera did not include a leading role for his partner Pears, who instead was given the comic drag role of Flute/Thisbe.
Document 4: Die Fledermaus: Die Fledermaus (] , "The Bat", sometimes called "The Revenge of the Bat") is an operetta composed by Johann Strauss II to a German libretto by and Richard Genée.
Document 5: String Quartet No. 2 (Britten): String Quartet No. 2 in C major, Op. 36, by English composer Benjamin Britten (191376), was written in 1945. It was composed in Snape, Suffolk and London, and completed on 14 October. The first performance was by the Zorian Quartet in the Wigmore Hall, London on 21 November 1945, in a concert to mark the exact 250th anniversary of the death of English composer Henry Purcell (165995). The work was commissioned by and is dedicated to Mary ("Mrs J. L.") Behrend, a patron of the arts; Britten donated most of his fee towards famine relief in India.
Document 6: The Habit of Art: The Habit of Art is a 2009 play by English playwright Alan Bennett, centred on a fictional meeting between W. H. Auden and Benjamin Britten while Britten is composing the opera "Death in Venice". It premiered on 5 November 2009 at the Lyttelton Theatre at the Royal National Theatre, with the central roles filled by Alex Jennings as Britten and Richard Griffiths as Auden (the latter replacing Michael Gambon, who had to withdraw from the production due to minor ill health). The performance of April 22, 2010 was broadcast to more than 200 cinemas worldwide by NTLive.
Document 7: Martha (opera): Martha, oder Der Markt zu Richmond ("Martha, or The Market at Richmond") is a "romantic comic" opera in four acts by Friedrich von Flotow set to a German libretto by Friedrich Wilhelm Riese and based on a story by Jules-Henri Vernoy de Saint-Georges.
Document 8: Werther: Werther is an opera ("drame lyrique") in four acts by Jules Massenet to a French libretto by Édouard Blau, Paul Milliet and Georges Hartmann (who used the pseudonym Henri Grémont). It is loosely based on the German epistolary novel "The Sorrows of Young Werther" by Johann Wolfgang von Goethe, which was based both on fact and on Goethe's own early life. Earlier examples of operas using the story were made by Kreutzer (1792) and Pucitta (1802).
Document 9: Martha Richler: Martha Richler is an art historian and cartoonist. Working for the "Evening Standard", she was the first woman to produce a daily cartoon for the newspapers based in London, known collectively as "Fleet Street". Her father is the writer Mordecai Richler and her pen name, Marf, is his name for her. She produces work for web sites, including PoliticalBetting.com.
Document 10: Martha (1974 film): Martha is a 1974 drama film made for German television directed by Rainer Werner Fassbinder. It features Margit Carstensen in the title role with Karlheinz Böhm as her abusive husband. It is one of the earliest of Fassbinder's films to be influenced by the American work of Douglas Sirk. The plot was loosely based on a short story "For the Rest of Her Life" by Cornell Woolrich.
Document 11: The Turn of the Screw (opera): The Turn of the Screw is a 20th-century English chamber opera composed by Benjamin Britten with a libretto by Myfanwy Piper, "wife of the artist John Piper, who had been a friend of the composer since 1935 and had provided designs for several of the operas". The libretto is based on the novella "The Turn of the Screw" by Henry James. The opera was commissioned by the Venice Biennale and given its world premiere on 14 September 1954, at the Teatro La Fenice, Venice. The original recording was made during that year, with the composer conducting.
Document 12: The Turn of the Screw (2009 film): The Turn of the Screw (also known as Ghost Story: The Turn of the Screw) is a British television film based on Henry James's 1898 ghost story of the same name. Commissioned and produced by the BBC, it was first broadcast on 30 December 2009, on BBC One. The novella was adapted for the screen by Sandy Welch, and the film was directed by Tim Fywell. Although generally true to the tone and story of James's work, the film is set in the 1920s—in contrast to the original 1840s setting—and accentuates sexual elements that some theorists have identified in the novella. The film's story is told in flashbacks during consultations between the institutionalised Ann (Michelle Dockery) and Dr Fisher (Dan Stevens). Ann tells how she was hired by an aristocrat (Mark Umbers) to care for the orphans Miles (Josef Lindsay) and Flora (Eva Sayer). She is met at the children's home, Bly, by Mrs Grose (Sue Johnston), the housekeeper. Ann soon begins to see unknown figures around the manor, and seeks an explanation.
Document 13: Benjamin Britten: Edward Benjamin Britten, Baron Britten {'1': ", '2': ", '3': ", '4': "} (22 November 1913 – 4 December 1976) was an English composer, conductor and pianist. He was a central figure of 20th-century British classical music, with a range of works including opera, other vocal music, orchestral and chamber pieces. His best-known works include the opera "Peter Grimes" (1945), the "War Requiem" (1962) and the orchestral showpiece "The Young Person's Guide to the Orchestra" (1945).
Document 14: Vanessa (opera): Vanessa is an American opera in three (originally four) acts by Samuel Barber, opus 32, with an original English libretto by Gian-Carlo Menotti. It was composed in 1956–1957 and was first performed at the Metropolitan Opera in New York City on January 15, 1958 under the baton of Dimitri Mitropoulos in a production designed by Cecil Beaton and directed by Menotti. Barber revised the opera in 1964, reducing the four acts to the three-act version most commonly performed today.
Document 15: Euryanthe: Euryanthe is a German "grand, heroic, romantic" opera by Carl Maria von Weber, first performed at the Theater am Kärntnertor, Vienna on 25 October 1823. Though acknowledged as one of Weber's most important operas, the work is rarely staged because of the weak libretto by Helmina von Chézy (who, incidentally, was also the author of the failed play "Rosamunde", for which Franz Schubert wrote music). "Euryanthe" is based on the 13th-century romance ""L'Histoire du très-noble et chevalereux prince Gérard, comte de Nevers et la très-virtueuse et très chaste princesse Euriant de Savoye, sa mye.""
ground_truth: opera