Question: Simon Boccanegra and L'elisir d'amore, are operas?

Context articles: Nigel Levings
Donato Lovreglio
Simon Boccanegra
Anthony Michaels-Moore
Rolando Panerai
L'elisir d'amore
Ingvar Wixell
Tenore di grazia
Plácido Domingo
Simone Boccanegra (film)

Nigel Levings is an Australian stage lighting designer.
 He has designed lights for over 400 productions.
 He works extensively on operas, and has designed a large portion of Opera Australia's repertoire.
 Some of his most significant works include operas such as "The Demon" at the Bregenz Festival and for Zurich Opera; "Billy Budd" for the Welsh National Opera, Opera Australia, Canadian Opera Company, and for the English National Opera; "Nabucco" for Opera Australia; "Wozzeck" for Opera Australia; "L'Orfeo" for Innsbrucker Festwochen der Alten Musik and the Berlin State Opera; "A Midsummer Night's Dream" for the 1994 Edinburgh Festival; "La Belle Vivette" for the English National Opera; "Simon Boccanegra" for the Royal Opera House, Washington National Opera, and Dallas Opera; "Falstaff" for Théâtre du Châtelet; "Idomeneo", "Turandot", and "The Barber of Seville" for the Houston Grand Opera; and "Queen of Spades" for the Dallas Opera.
Donato Lovreglio (6 December 1841, in Bari – May 1907, in Naples) was an Italian flautist and composer, mainly of music for his own instrument and other woodwinds.
 He was a native of Bari, and later moved to Naples, where he died.
 Among his compositions are numerous concert fantasies and arrangements of themes from a number of Giuseppe Verdi's operas, including "Simon Boccanegra", "Don Carlos", and "La traviata".
Simon Boccanegra (] ) is an opera with a prologue and three acts by Giuseppe Verdi to an Italian libretto by Francesco Maria Piave, based on the play "Simón Bocanegra" (1843) by Antonio García Gutiérrez, whose play "El trovador" had been the basis for Verdi's 1853 opera, "Il trovatore".
Anthony Michaels-Moore (born 8 April 1957) is an English operatic baritone and the first British winner of the Luciano Pavarotti International Voice Competition (Philadelphia, 1985) Anthony has since performed in many of the world's major opera houses across Europe, the Americas, and Asia.
 He has distinguished himself as a specialist in Verdi and Puccini roles, most renowned for his portrayals of Falstaff, Nabucco, Rigoletto, Simon Boccanegra, Iago in "Otello", Germont in "La traviata", Sharpless in "Madama Butterfly", and Scarpia in "Tosca".
 In addition to the standard repertoire, he has sung and recorded the baritone roles of some of the less-known 19th Century Italian operas.
Rolando Panerai (born 17 October 1924) is an Italian baritone, particularly associated with the Italian repertory.
 He was born in Campi Bisenzio, near Florence, Italy and studied with Frazzi in Florence and Armani and Giulia Tess in Milan.
 Panerai made his stage debut in 1947 in Naples at the Teatro di San Carlo as the pharaon in Rossini's "Mosè in Egitto".
 Other debuts, both in 1951, were as Simon Boccanegra in "Simon Boccanegra" in Bergamo and as Sharpless in "Madama Butterfly" at La Scala in Milan.
 He sang in many rarely performed Verdi operas on radio broadcast for RAI in 1951 (to commemorate the 50th anniversary of Verdi's death), such as "Giovanna d'Arco", "La battaglia di Legnano", and "Aroldo".
 Later roles included most of the great Verdi baritone roles, particularly the title character in "Rigoletto", The Count of Luna in "Il trovatore", Giorgio Germont in "La traviata", Marquis of Posa in "Don Carlos", Amonasro in "Aida".
L'elisir d'amore (The Elixir of Love, ] ) is a comic opera ("melodramma giocoso ") in two acts by the Italian composer Gaetano Donizetti.
 Felice Romani wrote the Italian libretto, after Eugène Scribe's libretto for Daniel Auber's "Le philtre" (1831).
 The opera premiered on 12 May 1832 at the Teatro della Canobbiana in Milan.
Karl Gustaf "Ingvar" Wixell, (May 7, 1931October 8, 2011) was a Swedish baritone who had an active international career in operas and concerts from 1955 to 2003.
 He mostly sang roles from the Italian repertory, and, according to "The New York Times", "was best known for his steady-toned, riveting portrayals of the major baritone roles of Giuseppe Verdi — among them Rigoletto, Simon Boccanegra, Amonasro in "Aida", and Germont in "La traviata"".
Tenore di grazia , also called leggero tenor ("graceful" and "light" tenor, respectively), is a lightweight, flexible tenor voice type.
 The tenor roles written in the early 19th-century Italian operas are invariably leggero tenor roles, especially those by Rossini such as Lindoro in "L'italiana in Algeri", Don Ramiro in "La Cenerentola", and Almaviva in "Il barbiere di Siviglia"; and those by Bellini such as Gualtiero in "Il pirata", Elvino in "La sonnambula" and Arturo in "I puritani".
 Many Donizetti roles, such as Nemorino in "L'elisir d'amore" and Ernesto in "Don Pasquale", Tonio in "La fille du régiment", are also "tenore di grazia" roles.
 One of the most famous leggero tenors of that period was Giovanni Battista Rubini, for whom Bellini wrote nearly all his operas.
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.
Simone Boccanegra is a 1963 Australian TV play.
 It was directed by Christopher Muir.
 It was based on the opera "Simon Boccanegra" by Verdi.