Question: What profession does Emmanuel Chabrier and Leoš Janáček have in common?

Context paragraphs:
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.

Gwendoline (opera): Gwendoline is an opera in two acts and three scenes by the French composer Emmanuel Chabrier, with a libretto by Catulle Mendès.  It was first performed at the Théâtre de la Monnaie, Brussels, Belgium on 10 April 1886.  Further performances followed in Karlsruhe in 1889, Leipzig in 1890 and then in Lyons and Paris in 1893.  "Gwendoline" was Chabrier's attempt to write a serious opera in the style of Richard Wagner.

Elegy on the Death of Daughter Olga: Elegy on the Death of Daughter Olga, JW 4/30 (also translated as the Elegy on the Death of My Daughter Olga; in Czech: Elegie na smrt dcery Olgy) is a cantata for tenor solo, mixed choir and pianoforte, written by the Czech composer Leoš Janáček in 1903.  It was written to commemorate the death of composer's daughter, Olga Janáčková.  Janáček composed the piece to the text of the Russian teacher Marfa Nikolayevna Veveritsa.

Emmanuel Chabrier: Alexis Emmanuel Chabrier (] ; January 18, 1841September 13, 1894) was a French Romantic composer and pianist.  Although known primarily for two of his orchestral works, "España" and "Joyeuse marche", he left an important corpus of operas (including "L'étoile"), songs, and piano music.  He was admired by composers as diverse as Debussy, Ravel, Richard Strauss, Satie, Schmitt, Stravinsky, and the group of composers known as Les six.  Stravinsky alluded to "España" in his ballet "Petrushka"; Gustav Mahler called "España" "the beginnings of modern music" and alluded to the "Dance Villageoise" in the "Rondo Burleske" movement of his Ninth Symphony.  Ravel wrote that the opening bars of "Le roi malgré lui" changed the course of harmony in France, Poulenc wrote a biography of the composer, and Richard Strauss conducted the first staged performance of Chabrier's incomplete opera "Briséïs".

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.

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.

Leoš Firkušný: Leoš Firkušný was a Czech musicologist.  He was born on July 16, 1905 in Napajedla (today's Czech Republic).  He was an older brother of the famous pianist Rudolf Firkušný.  He was an expert on Leoš Janáček and did much to bring his music to the listeners abroad.  He was one of the founders of the music festival Prague Spring.  He died on July 9, 1950 in Buenos Aires, Argentina.

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.

Supporting paragraphs: Emmanuel Chabrier Leoš Janáček
Answer: composer