Question: Who wrote the original play that was inspired by a passion for a Vienne composer, and was the base for the opera Orpheus und Eurydike?

<P0-S0>  The German text is based on a play by Oskar Kokoschka. <P0-S1> Orpheus und Eurydike ("Orpheus and Eurydice") is an opera by Ernst Krenek. <P0-S2>  Kokoschka began writing his play during his convalescence (from wounds received on the Ukrainian front in 1915) and it premiered in 1921, one year before Rilke's Sonnets to Orpheus appeared. <P0-S3>  In 1923 he let it be known that he was looking for a composer to write incidental music. <P0-S4>  Kokoschka's expressionist, psychological treatment of the Orpheus myth, marked by his passion for Alma Mahler, appealed to Krenek so he approached Kokoschka. <SEP> <P1-S0> Class Enemy ("Klasni Neprijatelj" in local language) is a play produced by the East West Theatre Company from Sarajevo, Bosnia and Herzegovina. <P1-S1>  The play was originally written by a British playwright Nigel Williams, but East West Theatre Company's production was adapted by the show's director, Haris Pašović. <P1-S2>  The original play, set in the South London classroom in early 1980s, was in Pašović's production transported to Sarajevo of 2007. <P1-S3>  The original cast consisting of six high-school boys was replaced by seven characters – three girls and four boys. <P1-S4>  The free adaptation, while keeping the original spirit and main themes, was also inspired by the research conducted in Bosnian classrooms. <SEP> <P2-S0>  author, editor and socialite. <P2-S1>  She became the wife, successively, of composer Gustav Mahler, architect Walter Gropius, and novelist Franz Werfel, as well as the consort of several other prominent men, notably painter Oskar Kokoschka. <P2-S2> Alma Maria Mahler Gropius Werfel (born Alma Margaretha Maria Schindler; 31 August 1879 – 11 December 1964) was a Viennese-born composer. <P2-S3>  Musically active from her early years, she was the composer of at least seventeen songs for voice and piano. <P2-S4>  In later years her salon became part of the artistic scene, first in Vienna, then in Los Angeles and in New York. <SEP> <P3-S0> Krapp, ou, La dernière bande (English: "The Last Tape", German: "Krapp, oder Das letzte Band") is a chamber opera in one act by Marcel Mihalovici with a libretto by Samuel Beckett. <P3-S1>  The libretto is based on Beckett's 1958 play "Krapp's Last Tape", and large portions of the play's script were lifted for use in the libretto. <P3-S2>  Like the play, the opera is a monologue with the only character being that of Krapp. <P3-S3>  The opera was commissioned jointly by the Radiodiffusion-Télévision Française and the Bielefeld Opera, Germany. <P3-S4>  From the very beginning the opera's libretto has existed in three different languages: English (from the original play), French (for the French premiere) and German (for the German premiere). <P3-S5>  It premiered using the French-language version on RTF radio on 15 May 1961 and had its stage debut in Paris on 3 July 1961 at the Théâtre des Nations. <P3-S6>  The original stage production was performed by visiting artists from the Städtische Bühnen, notably American baritone William Dooley singing the title role. <P3-S7>  The work was next performed at the Städtische Bühnen on February 1962 with Dooley singing the role in German.