Question: Siegfried and Idomeneo are both what type of performances?

full_context: Document 1: 2006 Idomeneo controversy: On September 26, 2006, the Deutsche Oper Berlin announced the cancellation of four performances of Mozart's opera "Idomeneo, re di Creta", planned for November 2006, citing concerns that the production's depictions of the severed head of the Islamic prophet Muhammad raised an "incalculable security risk." "To avoid endangering its audience and employees, the management has decided against repeating "Idomeneo" in November 2006," the opera house said in a press release.
Document 2: Idomeneo: Idomeneo, re di Creta ossia Ilia e Idamante (Italian for "Idomeneus, King of Crete, or, Ilia and Idamante"; usually referred to simply as Idomeneo, K. 366) is an Italian language opera seria by Wolfgang Amadeus Mozart. The libretto was adapted by Giambattista Varesco from a French text by Antoine Danchet, which had been set to music by André Campra as "Idoménée" in 1712. Mozart and Varesco were commissioned in 1780 by Karl Theodor, Elector of Bavaria for a court carnival. He probably chose the subject, though it might have been Mozart. The work premiered on 29 January 1781 at the Cuvilliés Theatre in Munich, Germany.
Document 3: Siegfried (opera): Siegfried, WWV 86C, is the third of the four music dramas that constitute "Der Ring des Nibelungen" ("The Ring of the Nibelung"), by Richard Wagner. It premiered at the Bayreuth Festspielhaus on 16 August 1876, as part of the first complete performance of "The Ring" cycle.
Document 4: Il Bellerofonte: Il Bellerofonte is an 18th-century Italian opera in three acts by the Czech composer Josef Mysliveček. It conforms to the serious type (opera seria) that was typically set in the distant past. The libretto, based on the Greek legend of Bellerophon, was written by Giuseppe Bonecchi. The work was dedicated to King Ferdinand I of the Two Sicilies and was first performed at the Teatro San Carlo in Naples on 20 January 1767, the birthday of his father, King Charles III of Spain. The cast featured two stellar singers of the time, Caterina Gabrielli and Anton Raaff, in the leading roles. The opera was only the composer's second one, and the first that permitted him the opportunity to write music for first-rate vocal artists. The production was highly successful, indeed responsible for a meteoric rise in his reputation as an operatic composer. From the time of the premiere of "Bellerofonte" until his death in 1781, Mysliveček succeeded in having more new "opere serie" brought into production than any other composer in Europe. During the same time span, he also had more new operas staged at the Teatro San Carlo in Naples than any other composer.
Document 5: Mitridate, re di Ponto: Mitridate, re di Ponto ("Mithridates, King of Pontus"), K. 87 (74a), is an early opera seria in three acts by Wolfgang Amadeus Mozart. The libretto is by after Giuseppe Parini's Italian translation of Jean Racine's play "Mithridate".
Document 6: Götterdämmerung: Götterdämmerung ( ; Twilight of the Gods), WWV 86D, is the last in Richard Wagner's cycle of four music dramas titled "Der Ring des Nibelungen " ("The Ring of the Nibelung", or "The Ring" for short). It received its premiere at the Bayreuth Festspielhaus on 17 August 1876, as part of the first complete performance of the "Ring".
Document 7: La clemenza di Tito (Mysliveček): La clemenza di Tito ("The Clemency of Titus") is an 18th-century Italian opera in 3 acts by the Czech composer Josef Mysliveček. It was composed to a libretto by the Italian poet Metastasio that was first performed in 1734 with music of Antonio Caldara. For a performance in the 1770s, it would only be expected that a libretto of such age would be abbreviated and altered to suit contemporary operatic taste (similar to the setting of the same text by Wolfgang Amadeus Mozart). The cuts and changes in the text made for the 1774 performance of Mysliveček's opera are not attributable. All of Mysliveček's operas are of the serious type in Italian language referred to as opera seria.
Document 8: Richard Wagner: Wilhelm Richard Wagner ( ; ] ; 22 May 181313 February 1883) was a German composer, theatre director, polemicist, and conductor who is primarily known for his operas (or, as some of his later works were later known, "music dramas"). Unlike most opera composers, Wagner wrote both the libretto and the music for each of his stage works. Initially establishing his reputation as a composer of works in the romantic vein of Weber and Meyerbeer, Wagner revolutionised opera through his concept of the "Gesamtkunstwerk" ("total work of art"), by which he sought to synthesise the poetic, visual, musical and dramatic arts, with music subsidiary to drama. He described this vision in a series of essays published between 1849 and 1852. Wagner realised these ideas most fully in the first half of the four-opera cycle "Der Ring des Nibelungen" ("The Ring of the Nibelung").
Document 9: Die Meistersinger von Nürnberg: Die Meistersinger von Nürnberg (] ; "The Master-Singers of Nuremberg") is a music drama (or opera) in three acts, written and composed by Richard Wagner. It is among the longest operas commonly performed, usually taking around four and a half hours. It was first performed at the Königliches Hof- und National-Theater, today the home of the Bavarian State Opera, in Munich, on 21 June 1868. The conductor at the premiere was Hans von Bülow.
Document 10: Die Entführung aus dem Serail: Die Entführung aus dem Serail (K. 384; The Abduction from the Seraglio; also known as Il Seraglio ) is an opera Singspiel in three acts by Wolfgang Amadeus Mozart. The German libretto is by Christoph Friedrich Bretzner with adaptations by Gottlieb Stephanie. The plot concerns the attempt of the hero Belmonte, assisted by his servant Pedrillo, to rescue his beloved Konstanze from the seraglio of Pasha Selim. The work premiered on 16 July 1782 at the Vienna Burgtheater, with the composer conducting.
Document 11: Siegfried Wagner: Siegfried Wagner (6 June 18694 August 1930) was a German composer and conductor, the son of Richard Wagner. He was an opera composer and the artistic director of the Bayreuth Festival from 1908 to 1930.
Document 12: Die Walküre: Die Walküre (The Valkyrie), WWV 86B, is a music drama in three acts by Richard Wagner with a German libretto by the composer. It is the second of the four works that form Wagner's cycle "Der Ring des Nibelungen" ("The Ring of the Nibelung").
Document 13: Il re pastore: Il re pastore ("The Shepherd King") is an opera, K. 208, written by Wolfgang Amadeus Mozart to an Italian libretto by Metastasio, edited by Giambattista Varesco. It is an opera seria. The opera was first performed on 23 April 1775 in Salzburg, at the Palace of the Archbishop Count Hieronymus von Colloredo.
Document 14: Der Ring des Nibelungen: Der Ring des Nibelungen (The Ring of the Nibelung), WWV 86, is a cycle of four German-language epic music dramas composed by Richard Wagner. The works are based loosely on characters from the Norse sagas and the "Nibelungenlied". The composer termed the cycle a "Bühnenfestspiel" (stage festival play), structured in three days preceded by a " " ("preliminary evening"). It is often referred to as the Ring Cycle, "Wagner's Ring", or simply "The Ring".
Document 15: Der Messias: Der Messias, K. 572, is Wolfgang Amadeus Mozart's 1789 German-language version of "Messiah", George Frideric Handel's 1741 oratorio. On an initiative of Gottfried van Swieten, Mozart adapted Handel's work for performances in Vienna.
ground_truth: music