Question: Who was teacher of the composer of Faschingsschwank aus Wien? 

Context articles: Der K und K Kalypso aus Wien
Hans Peter Keller
Faschingsschwank aus Wien
Intuitive music
Almost Angels
Robert Schumann
The Great Waltz
Walzer aus Wien
Heinz aus Wien
Kunihiko Hashimoto

"Der K und K Kalypso aus Wien" (The K and K Calypso from Vienna) was the Austrian entry in the Eurovision Song Contest 1959, performed in German by Ferry Graf.
Hans-Peter Keller (11 March 1915 – 11 May 1988) was a German poet who authored several poem collections, e.g. "Auch Gold rostet" (Even Gold Rusts) or "Panoptikum aus dem Augenwinkel" (Panopticum seen from the corner of the eye).
 In the 1960s Hans-Peter Keller was teacher for literature at the vocational school for librarians in Düsseldorf.
Faschingsschwank aus Wien ("Carnival Scenes from Vienna" or "Carnival Jest from Vienna"), Op. 26, is a solo piano work by Robert Schumann.
 He began composition of the work in 1839 in Vienna.
 He wrote the first four movements in Vienna, and the last on his return to Leipzig.
Intuitive music is a form of musical improvisation based on instant creation in which fixed principles or rules may or may not have been given.
 It is a type of process music where instead of a traditional music score, verbal or graphic instructions and ideas are provided to the performers .
 The concept was introduced in 1968 by the German composer Karlheinz Stockhausen (; ), with specific reference to the collections of text-notated compositions "Aus den sieben Tagen" (1968) and "Für kommende Zeiten" (1968–70).
 The first public performance of intuitive-music text compositions, however, was in the collective work "Musik für ein Haus", developed in Stockhausen's 1968 Darmstadt lectures and performed on 1 September 1968, several months before the first realisations of any of the pieces from "Aus den sieben Tagen" (; ; ).
Almost Angels (also known in the UK as Born to Sing and in Austria and Germany as Ein Gruss aus Wien) is a 1962 Walt Disney Productions film about a group of boys in the Vienna Boys' Choir.
Robert Schumann (8 June 181029 July 1856) was a German composer and influential music critic.
 He is widely regarded as one of the greatest composers of the Romantic era.
 Schumann left the study of law, intending to pursue a career as a virtuoso pianist.
 He had been assured by his teacher Friedrich Wieck that he could become the finest pianist in Europe, but a hand injury ended this dream.
 Schumann then focused his musical energies on composing.
The Great Waltz is a musical conceived by Hassard Short with a book by Moss Hart and lyrics by Desmond Carter, using themes by Johann Strauss I and Johann Strauss II.
 It is based on a pasticcio by Erich Wolfgang Korngold and Julius Bittner called "Walzer aus Wien", first performed in Vienna in 1930.
 The story of the musical is loosely based on the real-life feud between the older and younger Strauss, allegedly because of the father's jealousy of his son's greater talent.
Walzer aus Wien ("Waltzes from Vienna," titled "The Great Waltz" in English) is a singspiel pasticcio in three acts, libretto by Alfred Maria Willner, Heinz Reichert, and Ernst Marischka, music by Johann Strauss II (son), arranged by Erich Wolfgang Korngold and Julius Bittner, first performed at the Stadttheater in Vienna on 30 October 1930.
 An English musical theatre adaptation called "The Great Waltz" played on Broadway in 1934, and another English version played in London in 1970.
Heinz aus Wien are a rock band from Austria.
 They sing in German.
 The band was created 1995.
 The band consists of Cornelius Dix (Bass), Michi Gaissmaier (vocals, guitar), Markus Gartner (guitar) and Bernd Jungmair (drums, vocals).
 Past members are Lelo Brossmann (guitar, vocals, 1995 – 2003) and Paul Wallner (guitar, 2003 – 2008).
Kunihiko or "Qunihico" Hashimoto (橋本 國彦 , Hashimoto Kunihiko , September 14, 1904 – May 6, 1949) was a Japanese composer, violinist, conductor, and musical educator.
 He was born in the Hongo district of Tokyo.
 In 1923, he entered the Tokyo Music School (presently Tokyo National University of Fine Arts and Music) where he studied violin and conducting.
 In composition, he was largely self-taught, but later he would study that subject as a graduate student at the same school.
 Initially, he was active as a composer and arranger, but he soon made himself a name as an accomplished teacher, and in 1933 was appointed as professor at his alma mater.
 Some of his students who would go on to become distinguished composers in their own right were Akio Yashiro, Yasushi Akutagawa, Ikuma Dan, and Toshiro Mayuzumi.
 See: .
 Between 1934 and 1937, he visited Wien as a Japanese government scholar to study with Egon Wellesz.
 During this period, he was introduced to the likes of Alban Berg, Wilhelm Furtwängler, and Bruno Walter.
 Before returning, he also made a sojourn to Los Angeles, where he studied with Arnold Schoenberg.
 He died in Kamakura in 1949, 44 years of age, from gastric cancer.