Question: Johann Christoph Pepusch and Sergei Prokofiev, were both of which musical occupation?
Context: The Beggar's Opera is a ballad opera in three acts written in 1728 by John Gay with music arranged by Johann Christoph Pepusch.  It is one of the watershed plays in Augustan drama and is the only example of the once thriving genre of satirical ballad opera to remain popular today.  Ballad operas were satiric musical plays that used some of the conventions of opera, but without recitative.  The lyrics of the airs in the piece are set to popular broadsheet ballads, opera arias, church hymns and folk tunes of the time. Visions fugitives, Op. 22, are a series of short piano pieces composed by Russian composer Sergei Prokofiev (1891–1953) between 1915 and 1917.  They were premiered by Prokofiev on April 15, 1918 in Petrograd, Soviet Union.  They were written individually, many for specific friends of Prokofiev's, and he originally referred to them as his "doggies" because of their "bite".  In August 1917, Prokofiev played them for Russian poet Konstantin Balmont, and others, at the home of a mutual friend.  Balmont was inspired to compose a sonnet on the spot, called "a magnificent improvisation" by Prokofiev who named the pieces ""Mimolyotnosti"" from these lines in Balmont's poem: ""In every fleeting vision I see worlds, Filled with the fickle play of rainbows"".  A French-speaking friend at the house, Kira Nikolayevna, immediately provided a French translation for the pieces: "Visions Fugitives".  Prokofiev often performed only a couple of them at a time as encores at the end of his performances. Johann Christoph Pepusch (1667 – 20 July 1752), also known as John Christopher Pepusch and Dr Pepusch, was a German-born composer who spent most of his working life in England. John Travers (ca. 1703 – June 1758) was an English composer who held the office of Organist to the Chapel Royal from 1737 to 1758.  Before filling several parochial posts in London he had been a choir boy at St. George's Chapel, Windsor and a pupil of Johann Christoph Pepusch. Sergei Sergeyevich Prokofiev ( ; Russian: Сергей Сергеевич Прокофьев , "Sergej Sergejevič Prokofjev" ; 27 April 1891 – 5 March 1953) was a Soviet composer, pianist and conductor.  As the creator of acknowledged masterpieces across numerous musical genres, he is regarded as one of the major composers of the 20th century.  His works include such widely heard works as the March from "The Love for Three Oranges," the suite "Lieutenant Kijé", the ballet "Romeo and Juliet" – from which "Dance of the Knights" is taken – and "Peter and the Wolf."  Of the established forms and genres in which he worked, he created – excluding juvenilia – seven completed operas, seven symphonies, eight ballets, five piano concertos, two violin concertos, a cello concerto, a Symphony-Concerto for cello and orchestra, and nine completed piano sonatas. Félix Rienth (born 24 June 1970) is a Swiss operatic tenor.  Born in Basel, he was a member of the Basel Boys Choir in his youth.  He made his first opera appearance as a boy with Theater Basel as the first boy in Wolfgang Amadeus Mozart's "The Magic Flute".  He attended the University of Basel where he earned diplomas in the Spanish and German languages.  He then studied singing privately in Basel with Heidi Wölnerhanssen before entering the Hochschule der Künste Bern; graduating from there in 2000 with a degree in opera performance.  He has since had a major career as a concert singer in the oratorio repertoire; appearing with important ensembles and at major music festivals throughout Europe, including a recital in presence of Her Majesty, Queen Fabiola of Belgium.  He has made about 20 recordings on a variety of labels.  A highly acclaimed production was the recording of Johann Christoph Pepusch]]'s "Tenor Cantatas" with his wife, Muriel Rochat Rienth, recorder player, and Swiss baroque ensemble "La Tempesta Basel".  His CD of Spanish baroque songs "Tonos humanos" by José Marín was considered as a reference recording by German magazine "Klassik heute".  2014 is appearing Georg Philipp Telemann's "Tenor Cantatas" with "La Tempesta Basel", elected among "Best CDs of the month" by Spanish magazine RITMO. Johann Christoph Fugger (1561-1612) was a German businessman and the last famous survivor of the Fugger vom Reh branch of the Fugger family.  He was employed at the royal court in Prague.  In 1603 he married Regina Greiner.  Johann Christoph was a member of the German nobility.  His grandfather, Gastel Fugger, got a patent of nobility in 1547.  Johann Christoph Fugger had no descendants.  Contemporary members of the Fugger vom Reh are descendants of Matthäus Fugger (1442-1489/92).  The current patriarch is Markus Fugger von dem Rech (born 1970). Polly is a ballad opera with text by John Gay and music by Johann Christoph Pepusch.  It is a sequel to Gay's "The Beggar's Opera".  Due to censorship, the opera was not performed in Gay's lifetime.  It had its world premiere on 19 June 1777 at the Haymarket Theatre in London.  A revised and edited version of the score by Clifford Bax and Frederic Austin premiered on 30 December 1922 at the Kingsway Theatre in London. The Royal Society of Musicians of Great Britain is a charity in the United Kingdom that supports musicians.  It is the oldest music-related charity in Great Britain, founded in 1738 as the "Fund for Decay'd Musicians" by a declaration of trust signed by 228 musicians, including Edward Purcell (eldest son of Henry Purcell), Thomas Arne, William Boyce, Johann Christoph Pepusch, Dr. John Worgan, and George Frideric Handel.  It still operates a bank account at Drummonds Bank (now part of Royal Bank of Scotland) which was opened by its first secretary, Michael Christian Festing, in November 1738. Frederic Austin (30 March 187210 April 1952) was an English baritone singer, a musical teacher and composer in the period 1905–30.  He is best remembered for his restoration and production of "The Beggar's Opera" by John Gay and Johann Christoph Pepusch, and its sequel, "Polly", in 1920–23.  Austin was the older brother of the composer Ernest Austin (1874–1947).
Answer: composer