Question: Are both Romeo and Juliet and Madama Butterfly operas?

Context articles: Madama Butterfly
Emilio Venturini
Un bel dì vedremo
Madame Butterfly (1954 film)
The Dancing Girl (short story)
Vladimir Galouzine
Brandon Jovanovich
Madame Butterfly (play)
Romeo and Juliet
Marco Balderi

Madama Butterfly (] ; "Madam Butterfly") is an opera in three acts (originally two) by Giacomo Puccini, with an Italian libretto by Luigi Illica and Giuseppe Giacosa.
Emilio Venturini (1878 - 1952) was an Italian operatic lyric tenor known for his portrayal of character roles.
 He made his professional opera debut in 1900 in Italy where he remained for the next several years.
 In 1901 he sang the role of Brighella in Mascagni's "Le maschere" at the Teatro Regio in Turin.
 He made his La Scala debut in 1903 as Froh in Wagner's "Das Rheingold" and sang in the premiere of Umberto Giordano's "Siberia".
 In 1904, he originated the role of Prince Yamadori in Puccini's "Madama Butterfly" at La Scala.
 In 1905, Venturini joined the roster of the Opéra National de Paris.
 In 1907 he moved to London to sing with Royal Opera at Covent Garden.
 In 1910, Venturini became a member of the Chicago Opera Association where he performed roles until the summer of 1917.
 While in Chicago he sang mostly character parts but did sing some major roles like Turiddu in "Cavalleria rusticana", Edgardo in "Lucia di Lammermoor" and the Pinkerton in "Madama Butterfly".
 In 1911 he sang the roles of Cassio in Verdi's "Otello" and Spoletta in Puccini's "Tosca" at the Metropolitan Opera.
 Venturini also returned to Italy for brief periods in 1910, 1911, and 1916 to perform roles with the Teatro Massimo in Palermo.
 In 1921, Venturini joined the roster at La Scala and sang roles with that opera house until 1948.
 He notably originated the roles of Il Tempiere in Boito's "Nerone" in 1924 and Pang in Puccini's "Turandot" in 1926.
 and was the first to record the role of Nereo in Boito's "Mefistofele" in the 1931 La Scala recording.
"Un bel dì vedremo " ("One fine day we’ll see") is a soprano aria from the opera "Madama Butterfly" (1904) by Giacomo Puccini to a libretto by Luigi Illica and Giuseppe Giacosa.
 It is sung by Cio-Cio San/Madama Butterfly (on stage with Suzuki), when she imagines and performs the return of Pinkerton on a white ship, signalled by a thread of smoke on the far horizon.
Madame Butterfly (Italian: Madama Butterfly ) is a 1954 Italian-Japanese musical film directed by Carmine Gallone and starring Kaoru Yachigusa, Nicola Filacuridi and Michiko Tanaka.
 It is based on the opera "Madama Butterfly" by Giacomo Puccini.
"The Dancing Girl" (舞姫 , Maihime ) was the first published short story by the Japanese writer Mori Ōgai.
 The story first appeared in "Kokumin no Tomo" (People's Friend, 国民之友) in 1890, and is based on Mori's own experiences as a medical student in Germany.
 In some ways, this tale foreshadows Puccini's "Madama Butterfly", which deals with a similar theme but with a slight role reversal: in "Madama Butterfly", a Western man abandons a Japanese woman, while in "The Dancing Girl" a Japanese man leaves a Western woman.
Vladimir Galouzine (Russian: Владимир Галузин , "Vladimir Galuzin", ] ) is a Russian tenor.
 He has performed in such Russian operas as "The Queen of Spades", "Boris Godunov" and "Khovanshchina" and has performed the lead roles in Italian operas like "Madama Butterfly", "Otello", "Tosca", "Aida", and "Manon Lescaut".
Brandon Jovanovich is an American operatic tenor whose repertoire encompasses Wagner, Puccini, Strauss, Britten, and from early Baroque to world premiere operas.
 He is most known for his passionate portrayals of Slavic, French and German operas.
 His signature roles include Don José in Bizet's "Carmen", B. F. Pinkerton in Puccini's "Madama Butterfly", Cavaradossi in Puccini's "Tosca", and the title role in Wagner's "Lohengrin".
Madame Butterfly: A Tragedy of Japan is a play in one act by David Belasco adapted from John Luther Long's 1898 short story "Madame Butterfly".
 It premiered on March 5, 1900, at the Herald Square Theatre in New York City and became one of Belasco's most famous works.
 The play and Long's short story served as the basis for the libretto of Puccini's 1904 opera, "Madama Butterfly".
 The title role was originally played in New York and London by Blanche Bates; in 1900–01 in New York by Valerie Bergere; and in 1913 by Clara Blandick.
Romeo and Juliet is a tragedy written by William Shakespeare early in his career about two young star-crossed lovers whose deaths ultimately reconcile their feuding families.
 It was among Shakespeare's most popular plays during his lifetime and along with "Hamlet", is one of his most frequently performed plays.
 Today, the title characters are regarded as archetypal young lovers.
Marco Balderi is an Italian orchestra conductor who began his career after winning the International Competitions of Salzburg and Alexandria.
 He toured Austria, China, Korea, France, Germany, Japan, Poland, Romania, Russia, Spain and Switzerland.
 He is known for acclaimed productions of "Madama Butterfly" at the Deutsche Oper in Berlin, and at the Opéra Bastille in Paris in January 2006, as well as Georges Bizet's "The Pearl Fishers" in New Delhi.
 Balderi has studied numerous symphonic works, including all the symphonies of Beethoven, Brahms, Tchaikovsky, Mozart and Schumann, and over 200 operas, forty of which he has conducted.
 He has also studied 650 sacred and profane vocal works.