Question: What do Un re in ascolto and Il trovatore have in common?

Context paragraphs:
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.

Frank Guarrera: Frank Guarrera (December 3, 1923 – November 23, 2007) was an Italian-American lyric baritone who enjoyed a long and distinguished career at the Metropolitan Opera, singing with the company for a total of 680 performances.  He performed 35 different roles at the Met, mostly from the Italian and French repertories, from 1948 through 1976.  His most frequent assignments at the house were as Escamillo in Georges Bizet's "Carmen", Marcello in Giacomo Puccini's "La Bohème", Valentin in Charles Gounod's "Faust", and Ping in Puccini's "Turandot".  He was also an admired interpreter of Mozart roles, establishing himself in the parts of both Guglielmo and Don Alfonso in "Così fan tutte" and Count Almaviva in "Le nozze di Figaro".  Most of the roles he portrayed were from the lyric repertoire, such as the title role in Tchaikovsky's "Eugene Onegin", but he also sang some heavier roles at the Met like Amonasro in "Aïda", Jack Rance in "La fanciulla del West" and Il conte di Luna in "Il trovatore".

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."

Francesco Anile: Francesco Anile (born 12 February 1962 in Polistena) is an Italian tenor.  He regularly sings in Italy and abroad, performing in theatres such as the Teatro Massimo in Palermo and San Carlo in Naples. " Turandot", "Norma" and "Otello" are some of the works of his repertory which he plays with more strength and character.  In March 2009, he was Manrico in Verdi's "Il trovatore", and he has performed Canio in "Pagliacci", directed by Franco Zeffirelli.

Under the Jaguar Sun: Under the Jaguar Sun is a collection of three short stories by Italo Calvino.  The stories were to have been in a book entitled "I cinque sensi" ("The Five Senses").  Calvino died before writing the stories dedicated to vision and touch.  In the Italian edition (, 1986) the stories are ordered as follows: "Il nome, il naso"; "Sotto il sole giaguaro"; and "Un re in ascolto".  The titular story "Sotto il sole giaguaro" was originally published as "Sapore sapere" ("learning to taste") in the June 1982 edition of FMR, an Italian magazine.

Loretta Di Franco: Loretta Di Franco is an American operatic soprano who is chiefly known for her more than 900 performances at the Metropolitan Opera from 1961-1995.  Originally a member of the Met's opera chorus, she eventually was promoted to singing small comprimario roles beginning with one of the pages in Wagner's "Tannhäuser" and the peasant girl in "The Marriage of Figaro" in 1961.  She went on to win the Metropolitan Opera National Council Auditions in 1965 which led to her first substantial role, Chloe in "The Queen of Spades".  She continued to appear annually at the Met for the next 30 years, performing both leading and supporting roles.  Some of the parts she performed at the Met included Annina in "La traviata", both the Aunt and Barena in Janáček's "Jenůfa", Barbarina and Marcellina in "The Marriage of Figaro", Berta in "The Barber of Seville", Countess Ceprano in "Rigoletto", the Dew Fairy and the Sandman in "Hansel and Gretel", Feklusa in "Káťa Kabanová", the First Lady in "The Magic Flute", the Flower Seller in Britten's "Death in Venice", Frasquita in "Carmen", Gerhilde in "Die Walküre", Giannetta in "L'elisir d'amore", Helen in "Mourning Becomes Electra", Ines in "Il trovatore", Jouvenot in "Adriana Lecouvreur", Kate Pinkerton in "Madama Butterfly", Laura in "Luisa Miller", Lauretta in "Gianni Schichi", Lisa in "La sonnambula", Marianne in "Der Rosenkavalier", Marthe in "Faust", Musetta in "La bohème", Oscar in "Un ballo in maschera", Samaritana in "Francesca da Rimini", Woglinde in both "Das Rheingold" and "Götterdämmerung", Xenia in "Boris Godunov", Zerlina in "Don Giovanni", and title role in "Lucia di Lammermoor".  In 1991 she created the role of the Woman with Child in the world premiere of John Corigliano's "The Ghosts of Versailles".

Luise Jaide: Luise Jaide (also Louise Jaide-Schlosser) (26 March 1842 – 2 January 1914) was a German operatic mezzo-soprano who had an active career during the latter half of the 19th century.  Among her signature roles were Amneris in "Aida", Azucena in "Il trovatore", Frau Reich in "The Merry Wives of Windsor", Idamante in "Idomeneo", Irmentraud in "Der Waffenschmied", and Mary in "The Flying Dutchman".  She is best remembered today for playing several roles in the first complete presentation of Richard Wagner's "The Ring Cycle" at the very first Bayreuth Festival in 1876.

Vincenzo Moscuzza: Vincenzo Moscuzza (1827–1896) was an Italian composer.  Born in Syracuse, Sicily, he was the son of composer Luigi Moscuzza, and his initial musical training was from his father.  He later studied at the Naples Conservatory with Saverio Mercadante.  He is chiefly known for his many operas, of which his most successful were "Stradella il trovatore" (1850), "Don Carlo" (1862), and "Gonzales Davila" (1869).  He died in Naples.

Zinka Milanov: Zinka Milanov (] ) (May 17, 1906 – May 30, 1989) was a Croatian-born operatic spinto soprano who had a major career centered on the Metropolitan Opera in New York City.  After finishing her education in Zagreb, Milanov made her debut in 1927 in Ljubljana as Leonora in Giuseppe Verdi's Il Trovatore.  From 1928 to 1936, she was the leading soprano of the Croatian National Theatre.  In 1937, Milanov performed at the Metropolitan Opera for the first time, where she continued to sing until 1966.  She also performed as a concert singer and was a noted vocal coach and teacher.  Mlanov is the sister of the composer and pianist Božidar Kunc.

Un re in ascolto: Un re in ascolto ("A King Listens") is an opera by Luciano Berio, who also wrote the Italian libretto.  It is based on a short story, Under the Jaguar Sun by Italo Calvino, but incorporates excerpts from Friedrich Einsiedel's 1778 libretto (as reworked by Friedrich Wilhelm Gotter between 1790 and 1791) for an opera based on Shakespeare's "The Tempest".  This became "Die Geisterinsel" in 1798, set to music written by Friedrich Fleischmann.  In addition, W. H. Auden's "The Sea and the Mirror: A Commentary on Shakespeare's The Tempest" was a source.

Supporting paragraphs: Un re in ascolto Il trovatore
Answer: opera