Question: Hermine Kittel (December 2, 1879 – April 7, 1948) was an Austrian contralto from Vienna, she later premiered in a revision of "Ariadne auf Naxos", an opera by Richard Strauss, with a German libretto by who?
Context: Ariadne auf Naxos ("Ariadne on Naxos") is a duodrama in one act by Czech composer Jiří Antonín Benda (also Georg Benda) with a German libretto by .  It was commissioned by Abel Seyler, whose theatrical company arrived in Gotha in 1774.  The opera's first performance was at the Schloss Friedenstein, Gotha, on 27 January 1775. Margarethe Siems (20 December 1879 – 13 April 1952) was a German operatic soprano and voice teacher.  A Kammersängerin of the Dresden State Opera, between 1909 and 1912 Siems created leading roles in three operas by Richard Strauss: Chrysothemis in "Elektra", the Marschallin in "Der Rosenkavalier", and Zerbinetta in "Ariadne auf Naxos". The Visitors is an opera in three acts and a prologue composed by Carlos Chávez to an English libretto by the American poet Chester Kallman.  The work was Chávez's only opera.  Its first version, with the title "Panfilo and Lauretta", premiered in New York City in 1957.  The final version with the title "The Visitors" was premiered in Guanajuato, Mexico in 1999, twenty years after the composer's death.  The story is set in 14th century Tuscany during the time of the Black Death.  The libretto (like those for "Pagliacci" and "Ariadne auf Naxos") uses the device of a play within a play to reflect and intensify the relationships between the protagonists, who in this case are loosely based on characters in "The Decameron". Le bourgeois gentilhomme (also widely know in its German form as "Der Bürger als Edelman"), Op. 60, is an orchestral suite written by Richard Strauss between 1911 and 1917.  The original idea of Hugo von Hofmannsthal was to revive Molière's 1670 play "Le Bourgeois gentilhomme", simplify the plot and introduce a "commedia dell'arte" troupe, add some incidental music and conclude matters with a one-act opera "Ariadne auf Naxos". Hermine Kittel (December 2, 1879 – April 7, 1948) was an Austrian contralto from Vienna.  She studied singing with Amalie Materna in Vienna.  She made her operatic debut in 1897 in Ljubljana.  Kittle first sang under Gustav Mahler at the Vienna Hofoper (Vienna State Opera) and later premiered in a revision of "Ariadne auf Naxos".  She sang at the Bayreuth Festival in 1902 and 1908, where she sang Erda in "Der Ring des Nibelungen".  She also sang at the Salzburg Festival, where she often played Marcellina in "The Marriage of Figaro". Ariadne auf Naxos ("Ariadne on Naxos"), Op.  60, is an opera by Richard Strauss with a German libretto by Hugo von Hofmannsthal.  Combining slapstick comedy and consummately beautiful music, the opera's theme is the competition between high and low art for the public's attention. This is a list of recordings of Ariadne auf Naxos, an opera by Richard Strauss with a German-language libretto by Hugo von Hofmannsthal.  The work was first performed at the Hoftheater in Stuttgart on 25 October 1912.  A radically revised version was performed in at the Hofoper in Vienna on 4 October 1916.  (All the recordings listed on this page are of the revised version.)  This list is incomplete. Erna Ellmenreich (30 May 1885 – 14 April 1976) was a German operatic soprano, a member of the Staatstheater Stuttgart.  She performed there leading parts and several premieres, including "Ariadne auf Naxos" by Strauss and works by Paul Hindemith. Ellen Shade is an American operatic soprano from New York.  Her repertoire includes the Kaiserin in "Die Frau ohne Schatten", the Marschallin "Der Rosenkavalier", Chrysothemis "Elektra", Ariadne "Ariadne auf Naxos", Arabella, Katya Kabanova, Aida, Desdemona "Otello", Amelia "Un ballo in Maschera", Amelia "Simon Boccanegra", Sieglinde "Die Walkure", Elsa "Lohengrin", Elisabeth "Tannhauser", Eva "Die Meistersinger von Nurnberg".  In Europe she has appeared at La Scala Milan, the Royal Opera House, Covent Garden, the Bastille and the Chatelet in Paris and in Vienna, Salzburg Festival, Berlin, Hamburg, Frankfurt [Article Reference], Stuttgart, Amsterdam, Brussels, Geneva and Athens.  In North America she has performed with virtually all the major opera companies, including the Metropolitan Opera New York, Chicago, San Francisco, Los Angeles, Houston, Dallas, Seattle, Santa Fe, and the Canadian Opera in Toronto. Susanne Mentzer (born January 21, 1957) is an American operatic mezzo-soprano.  She is best known for singing trouser roles, such as Cherubino in Mozart's "Le nozze di Figaro", Idamante in Mozart's "Idomeneo", Octavian in Richard Strauss' "Der Rosenkavalier" and the composer in Strauss' "Ariadne auf Naxos", as well as other music of Mozart, Strauss, Rossini, Berlioz and Mahler.
Answer: Hugo von Hofmannsthal