Dana Blankstein
Dana Blankstein- Cohen( born March 3, 1981) is the director of the Israeli Academy of Film and Television.
She is a film director, and an Israeli culture entrepreneur.
Peter Levin
Peter Levin is an American director of film, television and theatre.
John Farrell (businessman)
John Farrell is the director of YouTube in Latin America.
Ian Barry (director)
Ian Barry is an Australian director of film and TV.
John Donatich
John Donatich is the Director of Yale University Press.
Michael Govan
Michael Govan( born 1963) is the director of the Los Angeles County Museum of Art since 2006.
Prior to this, Govan worked as the director of the Dia Art Foundation in New York City.
Olav Aaraas
Olav Aaraas( born 10 July 1950) is a Norwegian historian and museum director.
He was born in Fredrikstad.
From 1982 to 1993 he was the director of Sogn Folk Museum, from 1993 to 2010 he was the director of Maihaugen and from 2001 he has been the director of the Norwegian Museum of Cultural History.
In 2010 he was decorated with the Royal Norwegian Order of St. Olav.
Max Neufeld
Max Neufeld (13 February 1887 – 2 December 1967) was an Austrian film director, actor and screenwriter.
He directed 70 films between 1919 and 1957.
He directed the 1934 film "The Song of the Sun", which starred Vittorio De Sica.
Opera Ball (1939 film)
Opera Ball( German: Opernball) is a 1939 German musical comedy film directed by Géza von Bolváry and starring Heli Finkenzeller, Fita Benkhoff and Marte Harell.
An operetta film, it is based on the 1898 work of the same name composed by Richard Heuberger.
In 1956 it was remade as" Opera Ball" in Austria with some of the same personnel.
The film's sets were designed by the art director Robert Herlth.
Erna Berger provided a singing voice.
The Opera Ball
The Opera Ball  is a 1931 German musical comedy film directed by Max Neufeld and starring Iván Petrovich, Liane Haid and Georg Alexander.
It was part of a large group of operetta films made during the decade.
The following year it was remade in French as "Beauty Spot".
A British remake is "After the Ball" (1932).
The film's sets were designed by the art directors Karl Weber and Erich Zander.
The film is not based on the operetta "Der Opernball".

Question: What nationality is the director of film The Opera Ball?
Answer: Austrian