Question: Are Domenico Cimarosa and Leoš Janáček both composers?

Context paragraphs:
Sinfonietta (Janáček): The Sinfonietta (subtitled “Military Sinfonietta” or “Sokol Festival”) is a very expressive and festive, late work for large orchestra (of which 25 are brass players) by the Czech composer Leoš Janáček.  It is dedicated “To the Czechoslovak Army” and Janáček said it was intended to express “contemporary free man, his spiritual beauty and joy, his strength, courage and determination to fight for victory.”  It started by Janáček listening to a brass band, becoming inspired to write some fanfares of his own.  When the organisers of the Sokol Gymnastic Festival approached him for a commission, he developed the material into the "Sinfonietta".  He later dropped the word "military".  The first performance was in Prague on 26 June 1926 under Václav Talich.  Typical performance duration is 20–25 minutes.

Presenzano Hydroelectric Plant: The Presenzano Hydroelectric Plant, officially known as the Domenico Cimarosa Hydroelectric Plant, is located along the Volturno River in Presenzano, Province of Caserta, Italy.  Using the pumped-storage hydroelectric method, it has an installed capacity of 1000 MW .  Construction began in 1979, it was finished in 1990 and the generators commissioned in 1991.  In 2004, the plant was renamed after Domenico Cimarosa.  Power is generated by releasing water from the upper Cesima reservoir down to the power plant which contains four reversible 250 MW Francis pump-turbine-generators.  After power production, the water is sent to the lower reservoir.  During periods of low energy demand, the same pump-generators pump water from the lower reservoir back to the upper where it becomes stored energy.  Power generation occurs when energy demand is high.  The upper reservoir, formed by an embankment dam, is located at an elevation of 643 m in the municipality of Sesto Campano in the Province of Isernia.  Both the upper and lower reservoirs have an active (or usable) storage capacity of 6000000 m3 .  The difference in elevation between both the upper and lower affords a hydraulic head of 495 m .

Leoš Janáček International Competition in Brno: The Leoš Janáček International Competition in Brno (hereinafter referred to as MSLJ) (Czech: Mezinárodní soutěž Leoše Janáčka v Brně ) is a music competition held annually by the Faculty of Music of the Janáček Academy of Music and Performing Arts Brno.  The MSLJ was named after the famous composer Leoš Janáček.

Leoš Janáček: Leoš Janáček (] , baptised Leo Eugen Janáček; 3 July 1854 – 12 August 1928) was a Czech composer, musical theorist, folklorist, publicist and teacher.  He was inspired by Moravian and other Slavic folk music to create an original, modern musical style.

Le donne rivali: Le donne rivali is an intermezzo in two acts by composer Domenico Cimarosa with an Italian libretto by a now unknown poet.  It is speculated that Giuseppe Petrosellini may have been the author of the libretto.  The opera premiered at the Teatro Valle in Rome during Carnival in 1780.  The original choreography was created by Alberto Cavos, the original costumes by Antonio Dian, and the original scenery by Domenico Fossati.  Music critics particularly admire the final quintet that closes the opera.  In recent years, "Le donne rivali" has been occasionally revived and recorded.  In 1991, the Juilliard Opera Center intertwined the work with Mozart's unfinished opera "Lo sposo deluso", which shares the same libretto, to make one large work.

Janáček (crater): Janáček is a crater on Mercury.  It has a diameter of 47 kilometers.  Its name was adopted by the International Astronomical Union in 1985.  Janáček is named for the Czech composer Leoš Janáček, who lived from 1854 to 1928.

Káťa Kabanová: Káťa Kabanová (also known in various spellings including "Katia", "Katja", "Katya", and "Kabanowa") is an opera in three acts, with music by Leoš Janáček to a libretto by , based on "The Storm", a play by Alexander Ostrovsky.  The opera was also largely inspired by Janáček's love for Kamila Stösslová.  This is often considered his first "mature" opera, despite the fact that he was 67 when it was premiered.  "Káťa Kabanová" is a clear response to Janáček's feelings for Kamila, and the work is dedicated to her.  The first performance was at the National Theatre (Národní divadlo v Brně ) in Brno on 23 November 1921.

Domenico Cimarosa: Domenico Cimarosa (] ; 17 December 1749, Aversa, Kingdom of Naples, now Province of Caserta – 11 January 1801, Venice) was an Italian opera composer of the Neapolitan school.  He wrote more than eighty operas during his lifetime, including his masterpiece, "Il matrimonio segreto" (1792).  Cimarosa also wrote numerous instrumental works, both secular and religious in nature.

Fedele Fenaroli: Fedele Fenaroli (Lanciano, 25 April 1730 - Naples, 1 January 1818 ) was an Italian composer and teacher.  Fenaroli entered the Conservatorio di Santa Maria di Loreto, one of the Music conservatories of Naples, becoming a pupil of Francesco Durante.  In 1762 he was appointed Maestro di Cappella.  Among his students were many celebrated Italian composers, such as Domenico Cimarosa, Nicola Antonio Zingarelli, and Saverio Mercadante.  Giuseppe Verdi was a second-generation student, as his teacher, Vincenzo Lavigna, was a student of Fenaroli.  Fenaroli wrote several treatises on music, which were widely used during the nineteenth century.  As a composer, he wrote mainly sacred music.

Destiny (Janáček): Destiny (also known as "Fate", Czech: "Osud" ) is an opera in three acts by Leoš Janáček to a Czech libretto by the composer and Fedora Bartošová.  Janáček began the work in 1903 and completed it in 1907.  The inspiration for the opera came from a visit by Janáček in the summer of 1903, after the death of his daughter Olga, to the spa at Luhačovice.  There, Janáček met Kamila Urválková, who had been the subject of an opera by Ludvík Čelanský, "Kamila", where she felt that Čelanský had falsely depicted her personality.  After learning that Janáček was a composer, Urválková persuaded Janáček to write another opera to counteract Čelanský's portrait of her.

Supporting paragraphs: Domenico Cimarosa Leoš Janáček
Answer: yes