Question: What country was the person who portrayed Chopin in the 1928 film called La Valse de l'adieu from?

full_context: Document 1: Frédéric Chopin: Possibly the first venture into fictional treatments of Chopin's life was a fanciful operatic version of some of its events. Chopin was written by Giacomo Orefice and produced in Milan in 1901. All the music is derived from that of Chopin.
Document 2: Frédéric Chopin: In 1836, at a party hosted by Marie d'Agoult, Chopin met the French author George Sand (born [Amantine] Aurore [Lucile] Dupin). Short (under five feet, or 152 cm), dark, big-eyed and a cigar smoker, she initially repelled Chopin, who remarked, "What an unattractive person la Sand is. Is she really a woman?" However, by early 1837 Maria Wodzińska's mother had made it clear to Chopin in correspondence that a marriage with her daughter was unlikely to proceed. It is thought that she was influenced by his poor health and possibly also by rumours about his associations with women such as d'Agoult and Sand. Chopin finally placed the letters from Maria and her mother in a package on which he wrote, in Polish, "My tragedy". Sand, in a letter to Grzymała of June 1838, admitted strong feelings for the composer and debated whether to abandon a current affair in order to begin a relationship with Chopin; she asked Grzymała to assess Chopin's relationship with Maria Wodzińska, without realising that the affair, at least from Maria's side, was over.
Document 3: Pierre Blanchar: Pierre Blanchar (30 June 1892 – 21 November 1963) was a French actor. He appeared in 54 films between 1922 and 1961. Blanchar was married to actress Marthe Vinot, with whom he had a daughter, actress Dominique Blanchar.
Document 4: Frédéric Chopin: Chopin's relations with Sand were soured in 1846 by problems involving her daughter Solange and Solange's fiancé, the young fortune-hunting sculptor Auguste Clésinger. The composer frequently took Solange's side in quarrels with her mother; he also faced jealousy from Sand's son Maurice. Chopin was utterly indifferent to Sand's radical political pursuits, while Sand looked on his society friends with disdain. As the composer's illness progressed, Sand had become less of a lover and more of a nurse to Chopin, whom she called her "third child". In letters to third parties, she vented her impatience, referring to him as a "child," a "little angel", a "sufferer" and a "beloved little corpse." In 1847 Sand published her novel Lucrezia Floriani, whose main characters—a rich actress and a prince in weak health—could be interpreted as Sand and Chopin; the story was uncomplimentary to Chopin, who could not have missed the allusions as he helped Sand correct the printer's galleys. In 1847 he did not visit Nohant, and he quietly ended their ten-year relationship following an angry correspondence which, in Sand's words, made "a strange conclusion to nine years of exclusive friendship." The two would never meet again.
Document 5: Jeanne Fusier-Gir: Jeanne Fusier-Gir (1885–1973) was a French stage and film actress. She was married to the painter Charles Gir, and was the mother of the film director François Gir.
Document 6: Marguerite Renoir: Marguerite Renoir (22 July 1906 – 12 July 1987) was a French film editor who worked on more than sixty films during her career. For many years Marguerite and director Jean Renoir were lovers, and she edited many of his films. Although she and Renoir never married, she took his surname.
Document 7: Xavier Gélin: Xavier Gélin (21 June 1946 – 2 July 1999) was a French actor and film producer, and son of Daniel Gélin and Danièle Delorme. Gélin was the son of French film stars Daniel Gélin and Daniele Delorme. Through his father, he was a half-brother of Fiona Gélin and Maria Schneider, also actresses. Gélin, a French actor and a mainstay of popular French cinema for more than three decades, died of cancer at the age of 53.
Document 8: A Song to Remember: A Song to Remember is a 1945 Columbia Pictures Technicolor biographical film which tells a fictionalised life story of Polish pianist and composer Frédéric Chopin. Directed by Charles Vidor and starring Paul Muni, Merle Oberon and Cornel Wilde.
Document 9: Frédéric Chopin: At the age of 21 he settled in Paris. Thereafter, during the last 18 years of his life, he gave only some 30 public performances, preferring the more intimate atmosphere of the salon. He supported himself by selling his compositions and teaching piano, for which he was in high demand. Chopin formed a friendship with Franz Liszt and was admired by many of his musical contemporaries, including Robert Schumann. In 1835 he obtained French citizenship. After a failed engagement to Maria Wodzińska, from 1837 to 1847 he maintained an often troubled relationship with the French writer George Sand. A brief and unhappy visit to Majorca with Sand in 1838–39 was one of his most productive periods of composition. In his last years, he was financially supported by his admirer Jane Stirling, who also arranged for him to visit Scotland in 1848. Through most of his life, Chopin suffered from poor health. He died in Paris in 1849, probably of tuberculosis.
Document 10: Jean-Pierre Léaud: Jean-Pierre Léaud, ComM (; born 28 May 1944) is a French actor, best known for playing Antoine Doinel in François Truffaut's series of films about that character, beginning with "The 400 Blows" ("Les Quatre Cents Coups", 1959). He also worked several times with Jean-Luc Godard, and is a significant figure of the French New Wave.
Document 11: Pierre Boulanger: Pierre Boulanger (born 8 August 1987) is a French actor. He is known for the 2003 film "Monsieur Ibrahim", where he played a young Jewish boy, Moises "Momo" Schmidt and for 2008 film "Nos 18 ans" where he played Richard. The young actor was then reported to be concentrating on his studies, and thus was not able to do movies. After two years, he did TV appearances and minor roles in movies. He is best known for his first major English film in 2011, "Monte Carlo" with Selena Gomez.
Document 12: Bernard Blancan: Bernard Blancan (born 9 September 1958) is a French actor. He has appeared in more than 85 films and television shows since 1989. He shared the award for Best Actor for his role in "Days of Glory" at the 2006 Cannes Film Festival.
Document 13: Frédéric Chopin: Chopin's life and his relations with George Sand have been fictionalized in numerous films. The 1945 biographical film A Song to Remember earned Cornel Wilde an Academy Award nomination as Best Actor for his portrayal of the composer. Other film treatments have included: La valse de l'adieu (France, 1928) by Henry Roussel, with Pierre Blanchar as Chopin; Impromptu (1991), starring Hugh Grant as Chopin; La note bleue (1991); and Chopin: Desire for Love (2002).
Document 14: Frédéric Chopin: Chopin has figured extensively in Polish literature, both in serious critical studies of his life and music and in fictional treatments. The earliest manifestation was probably an 1830 sonnet on Chopin by Leon Ulrich. French writers on Chopin (apart from Sand) have included Marcel Proust and André Gide; and he has also featured in works of Gottfried Benn and Boris Pasternak. There are numerous biographies of Chopin in English (see bibliography for some of these).
Document 15: Frédéric Chopin: In his native Poland, in France, where he composed most of his works, and beyond, Chopin's music, his status as one of music's earliest superstars, his association (if only indirect) with political insurrection, his love life and his early death have made him, in the public consciousness, a leading symbol of the Romantic era. His works remain popular, and he has been the subject of numerous films and biographies of varying degrees of historical accuracy.
ground_truth: French
sub_queries: Who portrayed Chopin in the 1928 film, La valse de l'adieu? Answer: Pierre Blanchar
What is the national identity of Pierre Blanchar ? Answer: French