Question: Montagues and Capulets is a work of classical music written by Russian composer Sergei Prokofiev and is the first one in the Suite No. 2 from "Romeo and Juliet", Op. 64ter, which consists of two parts from his 1935 ballet "Romeo and Juliet a ballet by Sergei Prokofiev based on a play by who?

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Visions fugitives: 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.

Lina Prokofiev: Lina Prokofiev (born Carolina Codina, 21 October 1897 – 3 January 1989) was a Spanish singer and the wife of Russian composer Sergei Prokofiev.  She spent eight years in the Soviet Gulag.

Semyon Kotko: Semyon Kotko (Russian: Семён Котко ), Op. 81, is an opera in five acts by Sergei Prokofiev to a libretto by Sergei Prokofiev and Valentin Katayev based on Katayev's 1937 novel "I, Son of Working People" (Russian: Я, сын трудового народа… ).  It was premiered on 23 June 1940 at the Stanislavsky Opera Theatre in Moscow.

Sergei O. Prokofieff: Sergei Olegovich Prokofieff (16 January 1954 – 26 July 2014) was a Russian anthroposophist.  He was the grandson of the composer Sergei Prokofiev and his first wife Lina Prokofiev, and the son of Oleg Prokofiev and his first wife Sofia Korovina.  Born in Moscow, he studied fine arts and painting at the Moscow School of Art.  He encountered anthroposophy in his youth, and soon made the decision to devote his life to it.

Romeo and Juliet (Prokofiev): Romeo and Juliet (Russian: Ромео и Джульетта ), Op. 64, is a ballet by Sergei Prokofiev based on William Shakespeare's play "Romeo and Juliet".  Prokofiev reused music from the ballet in three suites for orchestra and a solo piano work.

Romeo and Juliet (Cranko): Romeo and Juliet is ballet created by John Cranko to Sergei Prokofiev's eponymous score for the Stuttgart Ballet in 1962 and first seen in America in 1969.  The Joffrey Ballet presented the first American production of Cranko's choreography in its 1984–1985 season, including performances in New York City at the New York State Theater and in Washington, D.C. at the Kennedy Center.

Le pas d'acier (Prokofiev): Le pas d'acier ("The Steel Step" or "The Leap of Steel"; Russian: Стальной скок ) is a 1926 ballet in two scenes (Op. 41) containing 11 dances composed by Sergei Prokofiev.  Prokofiev also created an orchestral 4 movement suite from the ballet (Op. 41b).

Maddalena (opera): Maddalena (Russian: Маддалена ) is an opera in one act by the Russian composer Sergei Prokofiev, who also wrote the libretto based on a play by Magda Gustavovna Lieven-Orlov under the pen name Baron Lieven.  That play was in turn based on Oscar Wilde's play "A Florentine Tragedy.

Romeo + Juliet (ballet): Romeo + Juliet, as it is displayed in print, is a ballet by New York City Ballet balletmaster-in-chief Peter Martins to Sergei Prokofiev's "Romeo and Juliet" (1934–1940).  The premiere took place on Tuesday, 1 May 2007 at the New York State Theater, Lincoln Center.

Montagues and Capulets: Montagues and Capulets is a work of classical music written by Russian composer Sergei Prokofiev.  The piece is the first one in the Suite No. 2 from "Romeo and Juliet", Op. 64ter, which consists of two parts from his 1935 ballet "Romeo and Juliet".  He wrote versions for both orchestra and piano.

Supporting paragraphs: Montagues and Capulets Romeo and Juliet (Prokofiev)
Answer: William Shakespeare