Question: How many operas did the person who wrote Eduardo e Cristina write?

Context articles: Eduardo Cintrón
Gaetano Fraschini
Gioachino Rossini
American Opera Society
Eduardo e Mônica
Eduardo e Cristina
Armida (Mysliveček)
Luciano Mariani
Jean-Benjamin de La Borde
Osvald Chlubna

Eduardo E. Cintrón Suárez is a Puerto Rican politician and the current mayor of Guayama.
 Cintrón is affiliated with the Popular Democratic Party (PPD) and has served as mayor since 2013.
Gaetano Fraschini (16 February 1816 – 23 May 1887) was an Italian tenor.
 He created many roles in 19th century operas, including five composed by Giuseppe Verdi.
 His voice was "heroic ... with a baritonal quality, ... yet Verdi and Donizetti appreciated his ability to sing softly and with subtlety."
 An Italian biographer has pointed out Fraschini's role in extending the longevity of Donizetti's operas, while at the same time accelerating the ascent of Verdi's repertory.
 He was indeed the most prominent singer who facilitated the transition from Donizetti to Verdi.
 Fraschini sang over one hundred roles and Verdi placed him at the top of his favorite tenors' list and described him as a "natural Manrico" for his "Il trovatore".
 Fraschini also played a pivotal role in the success of many operas by Pacini and Mercadante.
Gioachino Antonio Rossini (] ; 29 February 179213 November 1868) was an Italian composer who wrote 39 operas, as well as some sacred music, songs, chamber music and piano pieces.
The American Opera Society (AOS) was a New York City based musical organization that presented concert and semi-staged performances of operas between 1951 and 1970.
 The company was highly influential in sparking and perpetuating the post World War II bel canto revival, particularly through a number of highly lauded productions of rarely heard works by Gioachino Rossini, Gaetano Donizetti, and Vincenzo Bellini.
 The AOS also presented many operas to the American public for the first time, including the United States premieres of Benjamin Britten's "Billy Budd", Giuseppe Verdi's "Giovanna d'Arco", George Frideric Handel's "Hercules" and Hector Berlioz's "Les troyens" to name just a few.
"Eduardo e Mônica" is a song from Brazilian rock band Legião Urbana's 1986 album Dois, released as promo single.
 It was said by Renato Russo to be his take on Bob Dylan; the lyrics "tell the story of two youngsters in Brasília who fall in love, despite having nothing in common".
Eduardo e Cristina (] ) is an operatic 'dramma' in two acts by Gioachino Rossini to an Italian libretto originally written by Giovanni Schmidt for "Odoardo e Cristina" (1810), an opera by Stefano Pavesi, and adapted for Rossini by Andrea Leone Tottola and Gherardo Bevilacqua-Aldobrandini.
Armida is an opera in three acts by Josef Mysliveček set to a libretto by Giovanni Ambrogio Migliavacca based on an earlier libretto by Philippe Quinault.
 It is one of many operas set at the time of the Crusades that is based on characters and incidents from Torquato Tasso's epic poem "La Gerusalemme liberata".
 This opera (and all the rest of Mysliveček's operas) belong to the serious type in Italian language referred to as "opera seria".
 It incorporates many elements from the operatic "reform" movement of the 1770s, including short vocal numbers and short choruses incorporated into the fabric of the drama and lavish use of accompanied recitative.
Luciano Mariani (1801 – 10 June 1859) was an Italian operatic bass.
 Amongst the several roles he created were Rodolfo in Bellini's "La sonnambula" [Milan, Teatro Carcano, 1831], Alfonso d'Este in Donizetti's "Lucrezia Borgia" and Oroe in Rossini's "Semiramide".
 His elder sister, Rosa Mariani, was also an opera singer (contralto) and sang Arsace in the premiere of "Semiramide".
 They toured Italy singing together in many operas.
 Mariani sang in Lisbon at the Teatro São Carlos from 1839 to 1840, where he appeared in several Portuguese premieres of Italian operas, as well as the world premieres of Antonio Luís Miró's opera "Virginia" and Manuel Inocêncio Liberato dos Santos's opera "Inês de Castro".
 Mariani was born in Cremona and died in Castell'Arquato, aged 58.
Jean-Benjamin de La Borde (5 September 1734 – 22 July 1794) was a French composer, writer on music and "fermier général" (farm tax collector).
 Born into an aristocratic family, he studied violin under Antoine Dauvergne and composition under Jean-Philippe Rameau.
 From 1762 to 1774, he served at the court of Louis XV as "premier valet de la chambre", losing his post on the death of the king.
 He wrote many operas, mostly comic, and a four-volume collection of songs for solo voice, "Choix de chansons mises en musique" illustrated by Jean-Michel Moreau.
 Many of the songs from the collection were later published individually through the efforts of the English folksong collector Lucy Etheldred Broadwood.
 His "Essai sur la musique ancienne et moderne" was published in 1780.
 La Borde was guillotined during the French Revolution in 1794.
Osvald Chlubna (July 22, 1893, Brno – October 30, 1971, Brno) was a prominent Czech composer.
 Intending originally to study engineering, Chlubna switched his major and from 1914 to 1924, he studied composition with Leoš Janáček.
 Until 1953, he worked as a clerk.
 Later, he taught at the Organ School in Brno for many years.
 He worked in many art organisations in Brno.
 Chlubna's works can be defined by three distinct periods: Romanticism, Impressionism, all the way to the Modern Constructivism.
 He delved into Symbolism as well.
 He used the texts of symbolic Czech poets, such as Otakar Březina, Jaroslav Vrchlický, Jaroslav Durych and others.
 He wrote several cycles of compositions for piano and organ, as well as instrumental concerts, symphonies, ouvertures and cantatas.
 He wrote many operas, often using his own librettos, such as "The Revenge of Catullus" based on the work of Vrchlický (1917), "Alladina and Palomid" (based on the work of Maeterlinck, 1925), "Ňura" (1932), "How the Death came in the World" (1936), "Jiří from Kunštát and Poděbrady" (based on the work of Alois Jirásek, 1941), "Cradle" (composed on the work of Jirásek, 1951), "Eupyros" (1960).
 He also wrote texts and articles primarily about Janáček.