Bert Grund
Bert Grund( 1920–1992) was a German composer of film scores.
Alonso Mudarra
Alonso Mudarra( c. 1510 – April 1, 1580) was a Spanish composer of the Renaissance, and also played the vihuela, a guitar- shaped string instrument.
He was an innovative composer of instrumental music as well as songs, and was the composer of the earliest surviving music for the guitar.
Abe Meyer
Abe Meyer( 1901 – 1969) was an American composer of film scores.
Thomas Morse
Thomas Morse( born June 30, 1968) is an American composer of film and concert music.
The Bird Seller (1953 film)
The Bird Seller is a 1953 West German musical film directed by Arthur Maria Rabenalt and starring Ilse Werner, Wolf Albach- Retty and Eva Probst.
An operetta film, it is one of several adaptations of the operetta" The Bird Seller" by Carl Zeller.
The film was made at the Bavaria Studios in Munich and shot in Agfacolor.
The sets were designed by the art director Felix Smetana.
Carl Zeller
Carl Adam Johann Nepomuk Zeller (19 June 1842 – 17 August 1898) was an Austrian composer of operettas.
Zeller was born in Sankt Peter in der Au, the only child of physician Johann Zeller and Maria Anna Elizabeth.
Zeller's father died before his first birthday, after which his mother remarried Ernest Friedinger.
In 1875, Zeller married Anna Maria Schwetz.
Zeller had a fine soprano voice, and sang in the Vienna Boys' Choir before studying and composition in the University of Vienna.
He worked as a civil servant at the Imperial Ministry of Education while composing choral works and a number of operettas, the best-known of which is "Der Vogelhändler".
All of his librettos were written (or co-written) by , often together with .
Legal troubles, including a perjury conviction, ended Zeller's career at the ministry and led to prison and public disgrace in the mid-1890s (although his prison sentence was later repealed).
After an injury in 1895 from falling on the ice, he spent his last years physically and then mentally ill.
Zeller died of pneumonia in Baden bei Wien at the age of 56.
Walter Ulfig
Walter Ulfig was a German composer of film scores.
Henri Verdun
Henri Verdun( 1895–1977) was a French composer of film scores.
The Bird Seller (1935 film)
The Bird Seller  is a 1935 German musical comedy film directed by E.W. Emo and starring Maria Andergast, Wolf Albach-Retty and Lil Dagover.
It is an operetta film, based on the work of the same name by Carl Zeller.
Amedeo Escobar
Amedeo Escobar( 1888–1973) was an Italian composer of film scores.

Question: What is the cause of death of composer of film The Bird Seller (1935 Film)?
Answer: pneumonia