Question: What was the original title of the opera in which Placido Domingo first appeared in 1961?  

full_context: Document 1: Riccardo Massi: Riccardo Massi is an Italian operatic tenor who had performed at such Italian theatres as both the Giuseppe Verdi Theatre and La Scala. He became known for his role as Mario Cavaradossi in "Tosca" which he performed in autumn of 2011 at the Bavarian State Opera and then performed again at the Berlin Opera Theatre in November of that year. His US debut was in February 2012 as Radames in "Aida" at the Metropolitan Opera following by another summer performance that year. In the autumn of 2012 he sang in "Il trovatore" staged by the Canadian Opera in Toronto and in February 2013 sang Calaf in "Turandot" produced by the Royal Swedish Opera. He also became known for his performance as Don Alvaro in "La forza del destino" at the Australian Opera and the same year sang in another "Aida" production, this time at the Michigan Opera Theatre. From 2013 to 2014 he performed at the Royal Opera House and as Cavaradossi at the Liceu in Barcelona. Later on, he returned to Royal Swedish Opera where he sang the title role in "Andrea Chenier" and then another "Radames" at the Houston Grand Opera. At the Opernhaus Zurich, he sang Calaf in December 2015.
Document 2: La traviata: La traviata (] , The Fallen Woman) is an opera in three acts by Giuseppe Verdi set to an Italian libretto by Francesco Maria Piave. It is based on "La Dame aux Camélias" (1852), a play adapted from the novel by Alexandre Dumas, fils. The opera was originally titled "Violetta", after the main character. It was first performed on 6 March 1853 at the La Fenice opera house in Venice.
Document 3: Francesco Dominici (operatic tenor): Francesco Dominici (1885–1968) was an Italian operatic tenor particularly admired for his acting in comedic roles. He made his professional opera debut as Fernando in Donizetti's "La favorite" at the Teatro Donizetti in Bergamo in 1914. He created the role of Prunier in the original 1917 production of Puccini's "La rondine" at the Grand Théâtre de Monte Carlo, a role which he performed at many other opera houses including the Teatro Comunale di Bologna. Over the next several years he played mostly leading roles at the Teatro Costanzi in Rome including Rodolfo in Puccini's "La Bohème", Fenton in Verdi's "Falstaff", and the Ernesto in Donizetti's "Don Pasquale". In the early 1920s he joined the roster at La Scala where he began playing more buffo roles than leading roles. In 1921, he sang the role of doctor Cajus in Verdi's Falstaff at La Scala and in 1922 was Filipeto in the company's first production of Ermanno Wolf-Ferrari's "I quattro rusteghi". In 1926 he created the role of Emperor Altoum in the original production of Puccini's "Turandot" at La Scala. In 1929 he went on tour with La Scala to Germany. Other roles that Dominici performed at La Scala include David in Wagner's "Die Meistersinger von Nürnberg", Monostatos in Mozart's "The Magic Flute", and the Neipperg in Umberto Giordano's "Madame Sans-Gêne". In 1931 he moved to Cuba, where he taught music for many years. Dominici died in Havana in 1968.
Document 4: Rigoletto: Rigoletto (] ) is an opera in three acts by Giuseppe Verdi. The Italian libretto was written by Francesco Maria Piave based on the play "Le roi s'amuse" by Victor Hugo. Despite serious initial problems with the Austrian censors who had control over northern Italian theatres at the time, the opera had a triumphant premiere at La Fenice in Venice on 11 March 1851.
Document 5: Repertoire of Plácido Domingo: Spanish tenor Plácido Domingo has officially sung 147 roles in Italian, French, German, English, Spanish and Russian. His main repertoire however is Italian ("Otello", Cavaradossi in "Tosca", "Don Carlo", Des Grieux in "Manon Lescaut", Dick Johnson in "La fanciulla del West", Radames in "Aida"), French ("Faust", "Werther", Don José in "Carmen", Samson in "Samson et Dalila"), and German ("Lohengrin", "Parsifal", and Siegmund in "Die Walküre"). Domingo currently continues to add more operas to his repertoire. Since 2009, he has moved substantially into the baritone repertoire, especially focusing on Verdi baritone roles. In 2015, he made his most recent debuts as Macbeth at the Berliner Staatsoper, Don Carlo in "Ernani" at the Metropolitan Opera, and Gianni Schicchi at the Los Angeles Opera. Tim Page, a Pulitzer Prize-winner for music criticism, described Domingo in a 1996 "Washington Post" article as "the most versatile, intelligent and altogether accomplished operatic tenor now before the public."
Document 6: La traviata discography: The following is a partial discography of the many audio and video recordings of Giuseppe Verdi's opera, La traviata. Based on the novel "La dame aux Camélias" by Alexandre Dumas, fils, "La traviata" has been a staple of the operatic repertoire since its premiere on 6 March 1853 at the Teatro La Fenice in Venice.
Document 7: The Three Tenors: The Three Tenors were a popular operatic singing group during the 1990s and early 2000s, consisting of Spaniards Plácido Domingo and José Carreras and the Italian Luciano Pavarotti. The trio began their collaboration with a performance at the ancient Baths of Caracalla in Rome, Italy on 7 July 1990, the eve of the 1990 FIFA World Cup Final. Zubin Mehta conducted the orchestra of Maggio Musicale Fiorentino and the orchestra of Teatro dell'Opera di Roma. The recording of this debut concert became the best-selling classical album of all time and led to additional performances and live albums. Around 1.3 billion viewers worldwide watched their second televised performance four years later at Dodger Stadium in Los Angeles. They last performed together at an arena in Columbus, Ohio on 28 September 2003.
Document 8: La Dame aux Camélias: La Dame aux Camélias (literally The Lady with the Camellias, commonly known in English as Camille) is a novel by Alexandre Dumas, "fils", first published in 1848, and subsequently adapted by Dumas for the stage. "La Dame aux Camélias" premiered at the Théâtre du Vaudeville in Paris, France on February 2, 1852. The play was an instant success, and Giuseppe Verdi immediately set about putting the story to music. His work became the 1853 opera "La Traviata", with the female protagonist, Marguerite Gautier, renamed Violetta Valéry.
Document 9: Operalia, The World Opera Competition: Operalia, The World Opera Competition is an annual international competition for young opera singers. Founded in 1993 by Plácido Domingo, the competition has helped launch the careers of several important artists, such as Joseph Calleja, Giuseppe Filianoti, Rolando Villazón, José Cura, Joyce DiDonato, Elizabeth Futral, Inva Mula, Ana María Martínez and Sonya Yoncheva.
Document 10: Il trovatore: Il trovatore (] ; Italian for "The Troubadour") is an opera in four acts by Giuseppe Verdi to an Italian libretto largely written by Salvadore Cammarano, based on the play "El trovador" (1836) by Antonio García Gutiérrez. It was Gutiérrez's most successful play, one which Verdi scholar Julian Budden describes as "a high flown, sprawling melodrama flamboyantly defiant of the Aristotelian unities, packed with all manner of fantastic and bizarre incident."
Document 11: Il trovatore discography: This is a partial discography of Giuseppe Verdi's opera "Il trovatore" ("The Troubadour") and "Le trouvère" (the revised version in French translation). At least 83 recordings exist of the opera as a whole, made between 1912 and 2011, although not all of them are absolutely complete. Of these, 45 are live audio recordings, 22 are studio audio recordings, and 16 are videos or movies. "Il trovatore" was first performed at the Teatro Apollo, Rome on 19 January 1853. "Le trouvère" was first presented on 12 January 1857.
Document 12: Plácido Domingo discography: Plácido Domingo has made hundreds of opera performances, music albums, and concert recordings throughout his career as an operatic tenor. From his first operatic leading role as Alfredo in "La traviata" in 1961, his major debuts continued in swift succession: "Tosca" at the Hamburg State Opera and "Don Carlos" at the Vienna State Opera in 1967; "Adriana Lecouvreur" at the Metropolitan Opera, "Turandot" in Verona Arena and "La bohème" in San Francisco in 1969; "La Gioconda" in 1970; "Tosca" in Royal Opera House, Covent Garden in 1971; "La bohème" at the Bavarian State Opera in 1972; "Il trovatore" at the Paris Opéra in 1973 and "Don Carlo" at the Salzburg Festival in 1975, "Parsifal" in 1992 at the Bayreuth Festival; and the list continues until today; the same role is often recorded more than once.
Document 13: La Traviata (1983 film): La Traviata is a 1983 Italian film written, designed, and directed by Franco Zeffirelli. It is based on the opera "La traviata" with music by Giuseppe Verdi and libretto by Francesco Maria Piave. Soprano Teresa Stratas, tenor Plácido Domingo, and baritone Cornell MacNeil starred in the movie, in addition to singing their roles. The film premiered in Italy in 1982 and went into general release there the following year. It opened in theatres in the U.S. on April 22, 1983. The movie's soundtrack with James Levine conducting the Metropolitan Opera Orchestra won a Grammy Award for Best Opera Recording.
Document 14: Rigoletto discography: This is a list of recordings of "Rigoletto", an opera by Giuseppe Verdi with an Italian libretto by Francesco Maria Piave based on the play "Le roi s'amuse" by Victor Hugo. It was first performed at La Fenice in Venice on 11 March 1851.
Document 15: Plácido Domingo: José Plácido Domingo Embil, {'1': ", '2': ", '3': ", '4': "} (] ; born 21 January 1941), known as Plácido Domingo, is a Spanish tenor, conductor and arts administrator. He has recorded over a hundred complete operas and is well known for his versatility, regularly performing in Italian, French, German, Spanish, English and Russian in the most prestigious opera houses in the world. Although primarily a "lirico-spinto" tenor for most of his career, especially popular for his Cavaradossi, Hoffmann, Don José, and Canio, he quickly moved into more dramatic roles, becoming the most acclaimed Otello of his generation. In the early 2010s, he transitioned from the tenor repertory into almost exclusively baritone parts, most notably Simon Boccanegra. He has performed 147 different roles.
ground_truth: "Violetta"