Question: What is the primary language used by the sibling of the screenwriter of Sredni Vashtar?

full_context: Document 1: Juliette Binoche: Juliette Binoche (; born 9 March 1964) is a French actress, artist and dancer. She has appeared in more than 60 feature films, been the recipient of numerous international awards, and has appeared on stage and in movies across the world. Coming from an artistic background, she began taking acting lessons during adolescence. After performing in several stage productions, she began acting in films by auteur directors Jean-Luc Godard ("Hail Mary", 1985), Jacques Doillon ("Family Life", 1985) and André Téchiné, who made her a star in France with the leading role in his 1985 drama "Rendez-vous". Her sensual performance in her English-language debut "The Unbearable Lightness of Being" (1988), directed by Philip Kaufman, launched her international career.
Document 2: Boxes (film): Boxes () is a 2007 French film and the directorial debut of Jane Birkin. Birkin also stars alongside Geraldine Chaplin and Michel Piccoli. The film is based on Birkin's own family life, chronicling three marriages and the three children she bore from these marriages. The title alludes to the way in which she compartmentalises these relationships and stages of her life. The film was nominated for the Grand Prix at the Bratislava International Film Festival. The film was screened in Un Certain Regard at the 2007 Cannes Film Festival on 21 May. It was released in France on 6 June 2007.
Document 3: The Cement Garden (film): The Cement Garden is a 1993 British drama film written and directed by Andrew Birkin. It is based on the 1978 novel of the same name written by Ian McEwan. It was entered into the 43rd Berlin International Film Festival, where Birkin won the Silver Bear for Best Director.
Document 4: Grigoriy Oster: Grigoriy Bentsionovich Oster (born 1947) is a Russian author and screenwriter. He has written scripts for over 70 animated films, and "is considered one of the most important living Russian authors of children’s books."
Document 5: Juno Temple: Temple was born in Hammersmith, London, the daughter of producer Amanda Pirie and film director Julien Temple. Her aunt is politician Nina Temple. She grew up in Taunton, Somerset, and attended Enmore Primary School, Bedales School, and King's College, Taunton. She has two younger brothers: Leo and Felix.
Document 6: The Selfish Giant (1972 film): The Selfish Giant is an animated short film adaptation of the short story by Oscar Wilde. The story has symbolic religious themes and may be considered a work of allegory in Christian literature. The film was produced in 1971 by the Canadian-based Potterton Productions and by Pyramid Films. It earned a 44th Academy Award nomination in the Animated Short Subject category. One of the film's animators was Micheline Lanctôt. The King's Singers provided the vocals after having formed only a few years before.
Document 7: Michael Haneke: Haneke's feature film debut was 1989's The Seventh Continent, which served to trace out the violent and bold style that would bloom in later years. Three years later, the controversial Benny's Video put Haneke's name on the map. Haneke achieved great success in 2001 with the critically successful French film The Piano Teacher. It won the prestigious Grand Prize at the 2001 Cannes Film Festival and also won its stars, Benoît Magimel and Isabelle Huppert, the Best Actor and Actress awards. He has worked with Juliette Binoche (Code Unknown in 2000 and Caché in 2005), after she expressed interest in working with him. Haneke frequently worked with real-life couple Ulrich Mühe and Susanne Lothar – thrice each.
Document 8: Sredni Vashtar (film): Sredni Vashtar is the 30-minute film adaptation , released in 1981, and written, produced and directed by Andrew Birkin based on the short story of the same name written by Hector Hugh Munro.
Document 9: Samantha Bond: Samantha Bond is the daughter of actor Philip Bond and TV producer Pat Sandys, and is the sister of the actress Abigail Bond and the journalist Matthew Bond. She was brought up in London, in homes in Barnes and St Margarets. She attended the Godolphin and Latymer School, and studied acting at the Bristol Old Vic Theatre School.
Document 10: India Jane Birley: Born in London, she is the daughter of Lady Annabel Vane-Tempest-Stewart, from her marriage to nightclub mogul Mark Birley. She has two brothers, Rupert (presumed deceased) and Robin; and three half-siblings, Zac, Jemima, and Ben Goldsmith from her mother's affair with James Goldsmith, the man who would become her second husband.
Document 11: Satyajit Ray: Ray directed 36 films, including feature films, documentaries and shorts. He was also a fiction writer, publisher, illustrator, calligrapher, music composer, graphic designer and film critic. He authored several short stories and novels, meant primarily for young children and teenagers. Feluda, the sleuth, and Professor Shonku, the scientist in his science fiction stories, are popular fictional characters created by him. He was awarded an honorary degree by Oxford University.
Document 12: Andrew Birkin: Andrew Timothy Birkin (born 9 December 1945) is an English screenwriter, director and occasional actor. He was born the only son of Lieutenant-Commander David Birkin and his wife, actress Judy Campbell. One of his sisters is the actress and singer Jane Birkin.
Document 13: Julie Delpy: Julie Delpy (; born 21 December 1969) is a French-American actress, film director, screenwriter, and singer-songwriter. She studied filmmaking at New York University's Tisch School of the Arts and has directed, written, or acted in more than 30 films, including "Europa Europa" (1990), "Voyager" (1991), "" (1993), the "Before" trilogy (1995, 2004, 2013), "An American Werewolf in Paris" (1997), and "2 Days in Paris" (2007). She has been nominated for three César Awards, two Online Film Critics Society Awards, and two Academy Awards. After moving to the United States in 1990, she became an American citizen in 2001.
Document 14: The Happy Prince (1974 film): The Happy Prince is an animated short film adaptation of the short story by Oscar Wilde. The film was produced in 1974 by the Canadian-based Potterton Productions as a follow-up to its 1971 film "The Selfish Giant".
Document 15: Jean-Stéphane Bron: Born in 1969 in Lausanne, Jean-Stéphane Bron graduated from the École cantonale d'art de Lausanne (ECAL). After "Known to Our Departments" and "The Way I Look at You", he directed for his first theatrical release "Corn in Parliament", among the biggest hits in Swiss cinema. His documentary films have been awarded various distinctions in Europe and the United States. In 2006, he made "My Brother Is Getting Married", his first fiction film.
ground_truth: French
sub_queries: Sredni Vashtar >> screenwriter Answer: Andrew Birkin
Andrew Birkin >> sibling Answer: Jane Birkin
Jane Birkin >> languages spoken, written or signed Answer: French