Question: What was the nationality of the author of the outline that Die Liebe der Danae is based on?

Context paragraphs:
Tessa – Leben für die Liebe: Tessa – Leben für die Liebe is another tite of the German television series Leben für die Liebe.

The Love of the Bajadere: The Love of the Bajadere (German: Die Liebe der Bajadere) is a 1926 German silent film directed by Géza von Bolváry and starring Helene von Bolvary.

Milly Mathis: Milly Mathis (September 8, 1901 – March 30, 1965) was a French actress who appeared in more than 100 films during her career.  Born on September 8, 1901 as Emilienne Pauline Tomasini in Marseilles, France, she made her film debut with a small, uncredited role in the 1927 German film, "Die Liebe der Jeanne Ney" (English - "The Love of Jeanne Ney").  Most of her parts would be in featured or supporting roles.  Her final performance would be in a featured role in French film, "Business" (1960).  She was also an occasional performer on France's legitimate stage.  She died on March 30, 1965 in Salon-de-Provence, France, and was buried in the Cimetière Saint-Pierre in Marseilles.

The Love of Jeanne Ney: The Love of Jeanne Ney (German: Die Liebe der Jeanne Ney , released as Lusts of the Flesh in the United Kingdom) is a 1927 silent German drama film directed by Georg Wilhelm Pabst from a Soviet novel by Ilya Ehrenburg.

The Love Express: The Love Express (German: Der Liebesexpreß) is a 1931 German musical comedy film directed by Robert Wiene and starring Georg Alexander, Dina Gralla and Joseph Schmidt.  No print of the film is known to survive, and it is therefore a lost film.  It is based on the operetta "Es lebe die Liebe" by Alexander Engel and Wilhelm Sterk.  It was one of a cycle of operetta films made during the early sound era.  A French-language version, "Venetian Nights" ("Nuits de Venise"), also directed by Wiene, was released the same year.

Germany in the Eurovision Song Contest 1972: Germany was represented by Mary Roos, with the song "Nur die Liebe läßt uns leben", at the 1972 Eurovision Song Contest, which took place on 25 March in Edinburgh.  "Nur die Liebe läßt uns leben" was the winner of the German national final, "Ein Lied für Edinburgh", held on 19 February.  Roos would later represent Germany again in 1984.

The Love of the Brothers Rott: The Love of the Brothers Rott (German:Die Liebe der Brüder Rott) is a 1929 German silent film directed by  Erich Waschneck and starring Olga Tschechowa, Jean Dax and Paul Henckels.

Hugo von Hofmannsthal: Hugo Laurenz August Hofmann von Hofmannsthal (] ; 1 February 1874 – 15 July 1929) was an Austrian prodigy, a novelist, librettist, poet, dramatist, narrator, and essayist.

Die Liebe der Danae: Die Liebe der Danae ("The Love of Danae") is an opera in three acts by Richard Strauss to a February 1937 German libretto by Joseph Gregor, based on an outline written in 1920, "Danae, or The Marriage of Convenience", by Hugo von Hofmannsthal.  Strauss worked on the score in 1937, 1938 and into 1939, although he was pre-occupied with completing "Daphne", developing ideas with Gregor and finally replacing him as librettist for "Capriccio", and then succumbed to illness, which caused postponement for several months into 1940.  The opera was finally finished on 28 June 1940.

Die Liebe und der Co-Pilot: Die Liebe und der Co-Pilot is an East German romantic comedy film directed by Richard Groschopp.  It was released in 1961.

Supporting paragraphs: Die Liebe der Danae Hugo von Hofmannsthal
Answer: Austrian