Question: Who was the subject of a Swedish film in 1967 and learned tight rope dancing with Gisela Brož?

full_context: Document 1: Gisella Perl: Gisella Perl (10 December 1907 –16 December 1988) was a Romanian Jewish gynecologist deported to Auschwitz concentration camp in 1944, where she helped hundreds of women as inmate gynecologist without the bare necessities to perform her work. She survived, emigrated to New York and was one of the first women to publicize these experiences in English in her 1948 memoir "I was a doctor in Auschwitz". She became a specialist in infertility treatment at Mount Sinai Hospital, New York and eventually moved with her daughter to live in Herzliya, Israel, where she died.
Document 2: Elvira Madigan (1967 film): Elvira Madigan is a 1967 Swedish film directed by Bo Widerberg, based on the tragedy of the Danish tightrope dancer Hedvig Jensen (born 1867), working under the stage name of Elvira Madigan at her stepfather's travelling circus, who runs away with the Swedish nobleman lieutenant Sixten Sparre (born 1854).
Document 3: Elvira Madigan (1943 film): Elvira Madigan is a 1943 Swedish romantic drama film directed by Ake Ohberg. The film is based on the famous true story of Elvira Madigan. The film stars Eva Henning and Åke Ohberg.
Document 4: Vera-Ellen: Vera-Ellen (born Vera-Ellen Westmeier Rohe; February 16, 1921 – August 30, 1981) was an American dancer and actress, principally
Document 5: Gretl Schörg: Born in Vienna, Schörg first trained for the profession of typist. In 1937, at the age of 23, she won a beauty contest and became " Queen of Danube ". That same year she made her stage debut in Ostrava at the Antonín Dvořák Theatre in the world premiere of Ödön von Horváth's play "Der jüngste Tag". She spent the next two years performing at that theatre, and at theatres in Karlovy Vary, Ostrava, Marienbad, and Vienna (Theater in der Josefstadt). In 1939 she joined the opera house in Aussig (now Usti nad Labem) where she became popular as a performer in operettas. She made her professional opera debut at that house as Hannerl in Heinrich Berté's arrangement of Franz Schubert's "Das Dreimäderlhaus".
Document 6: Elvira Madigan: Elvira Madigan (4 December 1867 – 19 July 1889) was the stage name of a Danish tightrope walker and trick rider, whose illicit affair and dramatic death were the subject of the Swedish film of 1967.
Document 7: John Madigan (ringmaster): John Adalbert Madigan, (12 August 1850 - 23 August 1897) was an American circus performer and ringmaster, during the later years of his life he worked in Scandinavia. He was raised in an American circus family of Irish background. He is known for his work in U.S circus scenes between 1866 and 1869, but from 1872 he worked at Cirkus Myers in Central Europe. To this circus, the Swedish-Norwegian circus artist Eleonora Olsen, later known as Laura Madigan (mother of Elvira Madigan) came to work in 1875, the two became a couple.
Document 8: Gisela Brož: Gisela Antonia Brož (Brosch) (also sometimes referred to as Gisela Madigan), (4 April 1865 - 1945) was an Austrian-American circus performer, tight rope dancer, and clown. Her parents were shoemaker Joseph Brož and his wife Maria. She went to convent school in Siebenbürgen and at the age of 15 she got to know the circus family Madigans with John and Laura who at that time toured with circus Krembser in Vienna. Gisela became their foster child and got to learn tight rope dancing, this along with the couple's two year younger daughter Elvira Madigan.
Document 9: Berousek family: The Berousek family is a Czech family, originally from Vilémov, with members who have been circus performers for two centuries. Skills include comedy, puppetry, acrobatics, equestrianism, bear training, tight rope walking, and juggling.
Document 10: Margaret Stonborough-Wittgenstein: Margaret "Gretl" Stonborough-Wittgenstein (September 19, 1882 – September 27, 1958), of the prominent and wealthy Viennese Wittgenstein family, was a sister of the philosopher Ludwig Wittgenstein and the pianist Paul Wittgenstein. She was the subject of a famous 1905 portrait painted for her wedding by the artist Gustav Klimt (Stonborough-Wittgenstein and other members of the Wittgenstein family were among Klimt's most important patrons), which was sold in 1960 by her son Thomas and may now be seen in the Neue Pinakothek gallery in Munich.
Document 11: Elin Fohström: Elin Fohström-Tallqvist, stage name Elina Vandár, (1868–1949) was a Finnish operatic soprano who performed in Finland, Russia, the Baltic countries, Germany and Italy at the end of the 19th century. After a relatively short but successful singing career, she returned to Helsinki where she worked as a voice teacher.
Document 12: Baroness Mary Vetsera: Baroness Marie Alexandrine von Vetsera (19 March 1871 – 30 January 1889) was a member of Austrian "second society" (new nobility) and one of Crown Prince Rudolf of Austria's mistresses. Vetsera and Rudolf were found dead, an apparent murder suicide, at his hunting lodge, Mayerling (see Mayerling Incident).
Document 13: Gizella Lutz: Ferenc Szálasiné (née Gizella Lutz or "Lucz"; 21 October 1906 – 1992) was the longtime companion and, for a brief time, wife, of Ferenc Szálasi who served as Leader of the Hungarian Nation and "de facto" Prime Minister of Hungary at the end of the Second World War. They were married on 29 April 1945, on the wedding day of Adolf Hitler and Eva Braun. She was captured by the United States Army on 3 July 1945 and transferred to Hungary. Her husband was executed on 12 March 1946. She was sentenced to twelve years imprisonment on 3 December 1953. She was released in 1958.
Document 14: Johanna Loisinger: Johanna Maria Louise Loisinger (1865–1951), was an Austrian actress, pianist, and soprano opera singer, She was born on 18 April 1865 in Preßburg, Austria (today Bratislava), the daughter of John Loisinger and Maria Meier.
Document 15: Marianne Löfgren: Marianne Löfgren (24 February 1910 – 4 September 1957) was a Swedish actress. She played in Åke Ohberg's "Elvira Madigan" (1943), director Ingmar Bergman's debut "Crisis" in 1946, Hasse Ekman's "Girl with Hyacinths" (1950) and in over a hundred other films in her native Sweden.
ground_truth: Elvira Madigan