Question: Are both Roberto Devereux and King Priam operas?

full_context: Document 1: Lucia di Lammermoor: Lucia di Lammermoor is a "dramma tragico" (tragic opera) in three acts by Gaetano Donizetti. Salvadore Cammarano wrote the Italian-language libretto loosely based upon Sir Walter Scott's historical novel "The Bride of Lammermoor".
Document 2: Paride ed Elena: Paride ed Elena (] ; "Paris and Helen") is an opera by Christoph Willibald Gluck. It is the third of Gluck's so-called reform operas for Vienna, following "Alceste" and "Orfeo ed Euridice", and the least often performed of the three. Like its predecessors, the libretto was written by Ranieri de' Calzabigi. The opera tells the story of the events between the Judgment of Paris and the flight of Paris and Helen to Troy. It was premiered at the Burgtheater in Vienna on 3 November 1770.
Document 3: Hyrtacus: In Greek mythology, Hyrtacus ( ; Greek: Ὕρτακος ) is an obscure character associated with the Trojan War. He was a comrade of King Priam of Troy. Hyrtacus married Arisbe, daughter of King Merops of Percote, after Priam had divorced her to marry Hecabe. Hyrtacus's son by Arisbe was named Asius and fought at Troy. In the "Aeneid", Hyrtacus is credited with two more sons, Nisus and Hippocoon. Hyrtacus's own parentage is not given.
Document 4: Le duc d'Albe: Le duc d'Albe (its original French title) or Il duca d'Alba (its later Italian title) is an opera in three acts originally composed by Gaetano Donizetti in 1839 to a French language libretto by Eugène Scribe and Charles Duveyrier. Its title, which translates as "The Duke of Alba", refers to its protagonist Fernando Álvarez de Toledo, 3rd Duke of Alba. The work was intended for performance at the Paris Opéra. However, William Ashbrook notes that "Rosine Stoltz, the director's mistress, disliked her intended role of Hélène and Donizetti put the work aside when it was half completed"
Document 5: King Priam: King Priam is an opera by Michael Tippett, to his own libretto. The story is based on Homer's "Iliad", except the birth and childhood of Paris, which are taken from the "Fabulae" of Hyginus.
Document 6: Arisbe (daughter of Merops): In Greek mythology, Arisbe was a daughter of Merops of Percote, a seer. In a non-Homeric story, she married Priam, later king of Troy, and bore him a son named Aesacus. Priam subsequently divorced her in favor of Hecuba, daughter of King Dymas of Phrygia. Arisbe then married Hyrtacus, to whom she bore a son named Asius. Ephorus wrote of Arisbe as the first wife of Paris.
Document 7: Roberto Devereux: Roberto Devereux (or "Roberto Devereux, ossia Il conte di Essex" ["Robert Devereux, or the Earl of Essex"]) is a "tragedia lirica", or tragic opera, by Gaetano Donizetti. Salvadore Cammarano wrote the Italian libretto after François Ancelot's tragedy "Elisabeth d'Angleterre" (1829), and based as well on the "Historie secrete des amours d'Elisabeth et du comte d'Essex" (1787) by "Jacques Lescéne des Maisons", although Devereux was the subject of at least two other French plays: "Le Comte d'Essex" by Thomas Corneille and "Le Comte d'Essex" by Gauthier de Costes, seigneur de la Calprenède.
Document 8: Isus (mythology): Isus was a minor character in Greek mythology mentioned in Homer's "Iliad", one of the 50 sons of King Priam by an unidentified woman. He was killed by Agamemnon. Little is known of Isus other than brief mentions or relatives. He was known as a brother of Antiphus, son of Priam and Hecuba.
Document 9: Maria Stuarda: Maria Stuarda (Mary Stuart) is a tragic opera ("tragedia lirica"), in two acts, by Gaetano Donizetti, to a libretto by Giuseppe Bardari, based on Andrea Maffei's translation of Friedrich Schiller's 1800 play "Maria Stuart".
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: La favorite: La Favorite (The Favourite, sometimes referred to by its Italian title: La favorita) is a grand opera in four acts by Gaetano Donizetti to a French-language libretto by Alphonse Royer and Gustave Vaëz, based on the play "Le comte de Comminges" by Baculard d'Arnaud. It premiered on December 2, 1840 at the Académie Royale de Musique (Salle Le Peletier) in Paris, France.
Document 12: Helen of Troy (miniseries): Helen of Troy is a 2003 television miniseries based upon Homer's story of the Trojan War, as recounted in the epic poem, "Iliad". This TV miniseries also shares the name with a 1956 movie starring Stanley Baker. It stars Sienna Guillory as Helen, Matthew Marsden as Paris, Rufus Sewell as Agamemnon, James Callis as Menelaus, John Rhys-Davies as Priam, Maryam d'Abo as Hecuba, as well as Stellan Skarsgård as Theseus. The series was entirely shot on location in the islands of Malta.
Document 13: Laomedon: In Greek mythology, Laomedon ( ; Ancient Greek: Λαομέδων ) was a Trojan king, son of Ilus, nephew of Ganymede and Assaracus, and father of Priam, Astyoche, Lampus, Hicetaon, Clytius, Cilla, Proclia, Aethilla, Medesicaste, Clytodora, and Hesione. Tithonus is also described by most sources as Laomedon's eldest legitimate son; and most sources omit Ganymedes from the list of Laomedon's children, but indicate him as his uncle instead. Laomedon's possible wives are Placia, Strymo (or Rhoeo) and Leucippe; by the former he begot Tithonus and by the latter King Priam (see John Tzetzes' "Scholia in Lycophronem" 18 («ὁ μὲν γὰρ Πρίαμος ἦν Λευκίππης, ὁ δὲ Τιθωνὸς Ῥοιοῦς ἢ Στρυμοῦς τῆς Σκαμάνδρου θυγατρὸς υἱός» : "Priamus was the son of Leucippe, whereas Tithonus was the son of Rhoeo or Strymo, the daughter of Scamander")). He also had a son named Bucolion by the nymph Calybe, as recounted by Homer in the "Iliad" (6.22). Dictys Cretensis (4.22) added Thymoetes to the list of Laomedon's children.
Document 14: Rita (opera): In 1841, while Donizetti was in Paris waiting for the libretto to be completed for a commission by La Scala, he had a chance encounter with Gustave Vaëz, who had co-written the libretti for two of his earlier operas, "Lucie de Lammermoor" (the French version of "Lucia di Lammermoor") and "La favorite". He asked Vaëz if he could provide a libretto for a short opera to keep him busy while waiting for the La Scala project to advance. Vaëz quickly created "Deux hommes et une femme" ("Two Men and a Woman"), a comic piece in one act consisting of eight musical numbers connected by spoken dialogue. According to Vaëz, Donizetti completed the score in eight days. However, the Opéra-Comique rejected it and Donizetti then had the libretto translated into Italian for an intended performance at the Teatro del Fondo in Naples. Following the death of the Teatro del Fondo's impresario, Domenico Barbaja, the Naples performance fell through. The score, still unperformed, was found in Donizetti's effects when he died in 1848.
Document 15: Trojan War: In Greek mythology, the Trojan War was waged against the city of Troy by the Achaeans (Greeks) after Paris of Troy took Helen from her husband Menelaus, king of Sparta. The war is one of the most important events in Greek mythology and has been narrated through many works of Greek literature, most notably through Homer's "Iliad". The "Iliad" relates four days in the tenth year of the decade-long siege of Troy; the "Odyssey" describes the journey home of Odysseus, one of the war's heroes. Other parts of the war are described in a cycle of epic poems, which have survived through fragments. Episodes from the war provided material for Greek tragedy and other works of Greek literature, and for Roman poets including Virgil and Ovid.
ground_truth: yes