Which play was adapted by Vladimir Zotov  Iolanta or Die Meistersinger von Nürnberg?
Iolanta
Die Meistersinger von Nürnberg
Die Meistersinger von Nürnberg (] ; "The Master-Singers of Nuremberg") is a music drama (or opera) in three acts, written and composed by Richard Wagner.
 It is among the longest operas commonly performed, usually taking around four and a half hours.
 It was first performed at the Königliches Hof- und National-Theater, today the home of the Bavarian State Opera, in Munich, on 21 June 1868.
 The conductor at the premiere was Hans von Bülow.
Iolanta
Iolanta, Op.
 69, (Russian: Иоланта ) is a lyric opera in one act by Pyotr Tchaikovsky.
 It was the last opera he composed.
 The libretto was written by the composer's brother Modest Tchaikovsky, and is based on the Danish play "Kong Renés Datter " ("King René's Daughter") by Henrik Hertz, a romanticised account of the life of Yolande de Bar.
 In the original Danish play, the spelling of the princess's name was "Iolanthe", later adopted for the otherwise unrelated Gilbert and Sullivan operetta of that name.
 The play was translated by Fyodor Miller and adapted by Vladimir Zotov.
 The opera received its premiere on 18 December 1892 in Saint Petersburg.
Adolf Robinson
Adolf Robinson (1838–1920) was an Austrian baritone who had a major opera career during the second half of the 19th century.
 His extensive stage repertoire contained numerous Wagnerian roles such as Wotan in "The Ring Cycle" and Hans Sachs in "Die Meistersinger von Nürnberg".
 Other highlights of his career included the title characters in Rossini's "William Tell", Mozart's "Don Giovanni", Verdi's "Rigoletto", Hérold's "Zampa", and Heinrich Marschner's "Der Templer und die Jüdin". Otto Edelmann
Otto Edelmann (February 5, 1917 in Vienna – May 14, 2003 in Vienna) was an Austrian bass.
 He was born in Vienna and studied singing in Vienna with Gunnar Graarud.
 His debut was at Gera as Figaro in Mozart's "The Marriage of Figaro".
 He later sang the Vienna State Opera, the Edinburgh Festival and the Metropolitan Opera.
 He sang at the Bayreuth Festival immediately after its reopening in 1951 after World War II, performing the role of Hans Sachs in Wagner's "Die Meistersinger von Nürnberg".
 (He also recorded as Veit Pogner the goldsmith in the same work in one of Hans Knappertsbusch's early recorded performances.)
 He also sang Ochs in Richard Strauss's "Der Rosenkavalier" at the first performances in the new Salzburg Festspielhaus in 1960.
 In 1957, he recorded the role of Wotan opposite Kirsten Flagstad in Georg Solti's recording of Act III of Wagner's "Die Walküre" (an album made prior to the later famous complete set of "Der Ring des Nibelungen").
 He died in Vienna. Kaspar Bausewein
Kaspar Bausewein (15 November 1838, Aub – 18 November 1903, Munich) was a German operatic bass who was active at the Bavarian State Opera from 1858 through 1900.
 While there, he notably portrayed several characters in the world premieres of operas composed by Richard Wagner.
 He created Pogner in "Die Meistersinger von Nürnberg" (June 21, 1868), Fafner in "Das Rheingold" (September 22, 1869), Hunding in "Die Walküre" (June 26, 1870), and Harald in "Die Feen" (June 29, 1888). Anna Kaufmann
Anna Kaufmann was a German operatic soprano who was a principal artist at the Bavarian State Opera in Munich from 1869 to 1872.
 Just prior to her appointment, the great soprano Mathilde Mallinger had left the Bavarian State Opera and Kaufmann succeeded her in the roles of Elsa in Richard Wagner's "Lohengrin", Elisabeth in Wagner's "Tannhäuser", and Eva in Wagner's "Die Meistersinger von Nürnberg" among other parts.
 She notably created the roles of Woglinde in Wagner's "Das Rheingold" on September 22, 1869 and Fricka in Wagner's "Die Walküre" on June 26, 1869.
 Currently, no further biographical details about Kaufmann's life both before and after her time at the Bavarian State Opera have surfaced. Herta Glaz
Herta Glaz (also spelled Hertha; September 16, 1910 in Vienna – January 28, 2006 in Hamden, Connecticut) was an American operatic mezzo-soprano, voice teacher, and opera director of Austrian birth.
 She became a United States citizen in 1943.
 She was a fixture at the Metropolitan Opera between 1942-1956 where she sang in more than 300 performances.
 She was also highly active with the San Francisco Opera between 1944-1951.
 Some of the roles she portrayed on stage were Marcellina in "Le Nozze di Figaro", Annina, Siegrune in "Die Walküre", Flosshilde in "Götterdämmerung" and Magdalene in "Die Meistersinger von Nürnberg". The Master of Nuremberg
The Master of Nuremberg (German: Der Meister von Nürnberg) is a 1927 German silent historical comedy film directed by Ludwig Berger and starring Rudolf Rittner, Max Gülstorff and Gustav Fröhlich.
 It is based on the 1868 opera "Die Meistersinger von Nürnberg" by Richard Wagner.
 It was considered artistically unsuccessful because of its overly theatrical presentation.
 It is also known by the alternative title The Meistersinger. Heinz Zednik
Heinz Zednik (born February 21, 1940) is an Austrian operatic tenor, closely associated with the character tenor roles of Wagner such as Mime and Loge ("Der Ring des Nibelungen") and David ("Die Meistersinger von Nürnberg").
 He is also distinguished in roles such as Valzacchi ("Der Rosenkavalier"), Monostatos ("The Magic Flute"), Pedrillo ("Die Entführung aus dem Serail"), the Scribe ("Khovanshchina"), the Captain in "Wozzeck", and the Director (Luciano Berio's "Un re in ascolto"). Hannelore Bode
Hannelore Bode (born 2 August 1941) is a German operatic soprano.
 She performed at the Bayreuth Festival from 1968 to 1978, including Elsa in "Lohengrin", Eva in "Die Meistersinger von Nürnberg", and several parts in the 1976 Jahrhundertring, including Sieglinde in "Die Walküre".
 She performed internationally and recorded operas with conductors such as Eugen Jochum, Silvio Varviso and Pierre Boulez.