Question: Ursula Gunther was a German musicologist, who specialized in the music of what Italian opera composer?

full_context: Document 1: Beatrix Borchard: Beatrix Borchard (born 1950) is a German musicologist and author. The focus of her publications is life and work of female and male musicians, such as Clara and Robert Schumann, Amalie and Joseph Joachim, Pauline Viardot-Garcia, Adriana Hölszky. Among her topics are also the role of music in the process of Jewish assimilation, the history of musical interpretation, and strategies of .
Document 2: Verdi, the King of Melody: Giuseppe Verdi, released theatrically in the USA as The Life and Music of Giuseppe Verdi and on video as Verdi, the King of Melody, is a 1953 Italian biographical film starring Pierre Cressoy and directed by Raffaello Matarazzo. It is based on adult life events of the composer Giuseppe Verdi. The film was a commercial success, grossing over 957 million lire at the Italian box office.
Document 3: Giuseppe Verdi (film): Giuseppe Verdi is a 1938 Italian biographical film directed by Carmine Gallone and starring Fosco Giachetti, Gaby Morlay and Germana Paolieri. The film portrays the life of the composer Giuseppe Verdi (1813-1901). The casting of Giachetti as Verdi was intended to emphasise the composer's patriotism, as he had recently played patriotic roles in films such as "The White Squadron". The film was made at the Cinecittà Studios in Rome. The film is also known by the alternative title The Life of Giuseppe Verdi.
Document 4: Edition Güntersberg: Edition Güntersberg is a German publishing house of classical music, focused on compositions for the viola da gamba. It was founded in Heidelberg in 1990 by Günter von Zadow and Leonore von Zadow-Reichling, who is a professional gambist. In addition to works from Renaissance and Baroque, the company has published music from the early classical period, for both viola da gamba, for example by Carl Friedrich Abel and baryton, including works by Joseph Haydn.
Document 5: Philip Gossett: Philip Gossett (September 27, 1941 – June 12, 2017) was an American musicologist and historian, and Robert W. Reneker Distinguished Service Professor of Music at the University of Chicago. His lifelong interest in 19th-century Italian opera, which began with listening to the Metropolitan Opera broadcasts in his youth, led to the publication of a major book on the subject, "Divas and Scholars: Performing Italian Opera", which won the Otto Kinkeldey Award of the American Musicological Society as the best book on music of 2006.
Document 6: Teatro Giuseppe Verdi: Teatro Giuseppe Verdi (the Giuseppe Verdi Theatre) is a small opera house located in a wing of the Rocca dei Marchesi Pallavicino on the Piazza Giuseppe Verdi in Busseto, Italy, a town closely associated with the life of the opera composer, Giuseppe Verdi. From the 13th century, the “rocca” or “fortress” was the family’s palace; it is now the city hall after being acquired by the municipality in 1856. The theatre opened on 15 August 1868 and seats 300.
Document 7: Giacomo Puccini: Giacomo Antonio Domenico Michele Secondo Maria Puccini (] ; 22 December 1858 29 November 1924) was an Italian opera composer who has been called "the greatest composer of Italian opera after Verdi".
Document 8: Günter Reich: Günter Reich (22 November 1921 – 15 January 1989), also spelled Günther Reich and Gunther Reich, was an Israeli baritone of German birth. He was a member of the Staatsoper Stuttgart for more than 20 years and is known for interpreting the works of Arnold Schoenberg in collaboration with Michael Gielen and Pierre Boulez.
Document 9: Suvini Zerboni: Suvini Zerboni (ESZ) Italian music publishing house founded in 1907 in Milan, taking its name from the theater society of the same name. The ESZ catalogue included, besides operetta favourites, the best of Italian contemporary music, such composers as Goffredo Petrassi, Luigi Dallapiccola, Luciano Berio, Ildebrando Pizzetti, and Gian Francesco Malipiero. Since the 1950s, ESZ has been the Italian agent of Schott Music, representing composers such as Igor Stravinsky, Carl Orff, Paul Hindemith, Richard Strauss, Luigi Nono, Krzysztof Penderecki and Joaquín Rodrigo. The ESZ catalalogue of modern Italian composers active since the 1970s is extensive. ESZ also publishes the bulletin “ESZ News” with information on the activities and performances of its composers. Until 1999 ESZ published "Il Fronimo", the guitar magazine founded by Ruggero Chiesa in 1972, and "La Cartellina", a magazine on choral and pedagogical music, founded by Roberto Goitre in 1977 and subsequently headed by Giovanni Acciai.
Document 10: Pietro Mascagni: Pietro Antonio Stefano Mascagni (] ; 7 December 1863 – 2 August 1945) was an Italian composer most noted for his operas. His 1890 masterpiece "Cavalleria Rusticana" caused one of the greatest sensations in opera history and single-handedly ushered in the "Verismo" movement in Italian dramatic music. While it was often held that Mascagni, like Leoncavallo, was a "one-opera man" who could never repeat his first success, "L'amico Fritz" and "Iris" have remained in the repertoire in Europe (especially Italy) since their premieres. Mascagni said that at one point, "Iris" was performed in Italy more often than "Cavalleria" (cf. Stivender).
Document 11: Aida: Aida (] ) is an opera in four acts by Giuseppe Verdi to an Italian libretto by Antonio Ghislanzoni. Set in Egypt, it was commissioned by and first performed at Cairo's Khedivial Opera House on 24 December 1871; Giovanni Bottesini conducted after Verdi himself withdrew. Today the work holds a central place in the operatic canon, receiving performances every year around the world; at New York's Metropolitan Opera alone, "Aida" has been sung more than 1,100 times since 1886. Ghislanzoni's scheme follows a scenario often attributed to the French Egyptologist Auguste Mariette, but Verdi biographer Mary Jane Phillips-Matz argues that the source is actually Temistocle Solera.
Document 12: Gesualdo: Death for Five Voices: Gesualdo: Death for Five Voices (German: "Tod für fünf Stimmen") is a 1995 film by German director Werner Herzog filmed for ZDF television. The film explores the music of Carlo Gesualdo and the legends surrounding Gesualdo's personality, his cursed castle, and his murder of his wife and her lover. Between narration and interviews, several of Gesualdo's madrigals are performed. Herzog calls "Death for Five Voices" "one of the films closest to my heart."
Document 13: Ursula Günther: Ursula Günther (15 June 1927 – 20 or 21 November 2006) was a German musicologist specializing in the fourteenth and early fifteenth centuries and the music of Giuseppe Verdi.
Document 14: Gaetano Fraschini: Gaetano Fraschini (16 February 1816 – 23 May 1887) was an Italian tenor. He created many roles in 19th century operas, including five composed by Giuseppe Verdi. His voice was "heroic ... with a baritonal quality, ... yet Verdi and Donizetti appreciated his ability to sing softly and with subtlety." An Italian biographer has pointed out Fraschini's role in extending the longevity of Donizetti's operas, while at the same time accelerating the ascent of Verdi's repertory. He was indeed the most prominent singer who facilitated the transition from Donizetti to Verdi. Fraschini sang over one hundred roles and Verdi placed him at the top of his favorite tenors' list and described him as a "natural Manrico" for his "Il trovatore". Fraschini also played a pivotal role in the success of many operas by Pacini and Mercadante.
Document 15: Giuseppe Verdi: Giuseppe Fortunino Francesco Verdi (] ; 9 or 10 October 1813 – 27 January 1901) was an Italian opera composer.
ground_truth: Giuseppe Fortunino Francesco Verdi