Question: A Woman's Revenge is a 1921 German silent drama film directed by Robert Wiene and starring Vera Karalli,, who was an actress and what kind of dancer during the early years of the 20th century?

Context paragraphs:
The Wandering Light: The Wandering Light (German: Das wandernde Licht) is a 1916 German silent drama film directed by Robert Wiene and starring Henny Porten, Bruno Decarli and Theodor Becker.  It was based on a short story by Ernst von Wildenbruch.  A Count marries a woman who come to wrongly believe that he is mad.

The Woman on the Rack: The Woman on the Rack (German: Die Frau auf der Folter) is a 1928 German silent drama film directed by Robert Wiene and starring Lili Damita, Vladimir Gajdarov and Johannes Riemann.  It was also known by the alternative title A Scandal in Paris.  It was based on a British play by Edward Hemmerde and Francis Neilson.  The wife of a British aristocratic politician, who is neglected by her husband, resists an attempt to break them up.  When her husband discovers what he mistakenly believes to be a dalliance with another man he begins divorce proceedings.  Eventually the truth comes out and the couple reconcile.  The film was not considered one of Wiene's greatest achievements, but he was praised for directing with his usual competence while Damita's performance as Lady Admaston was hailed.

The Mistress (1927 film): The Mistress (German: Die Geliebte) is a 1927 German silent drama film directed by Robert Wiene and starring Edda Croy, Harry Liedtke and Eugen Burg.  It was based on a play by Alexander Brody.  It was the first film Wiene made after returning to Germany after two years working in Austria, although the film's location shooting was done in Vienna, where the story is set.

A Woman's Revenge (1921 film): A Woman's Revenge (German: Die Rache einer Frau) is a 1921 German silent drama film directed by Robert Wiene and starring Vera Karalli, Franz Egenieff and Olga Engl.  In order to punish her cold, brutal aristocratic husband for murdering her lover, a woman becomes a common prostitute to shame him.  The film received largely negative reviews.

Playing with Fire (1921 German film): Playing with Fire (German: Das Spiel mit dem Feuer) is a 1921 German silent comedy-drama film directed by Georg Kroll and Robert Wiene and starring Diana Karenne, Vasilij Vronski, Ossip Runitsch and Anton Edthofer.  A method actress likes living out the roles she is playing in real life.  To prepare for her new play, she enters the criminal underworld and ends up being implicated in a burgalry of a Duke who is one of her suitors.  The film received a generally positive reception from critics, although some were doubtful about the blending of farce and tragedy.

Vera Karalli: Vera Alexeyevna Karalli (Russian: Вера Алексеевна Каралли ; 27 July 1889 – 16 November 1972) was a Russian ballet dancer, choreographer and silent film actress during the early years of the 20th century.

Robert Wiene: Robert Wiene (] ; 27 April 1873 – 17 July 1938) was a film director of the German silent cinema.  He is particularly known for directing the German silent film "The Cabinet of Dr. Caligari" and a succession of other expressionist films.  Wiene also directed a variety of other films of varying styles and genres.  Following the Nazi rise to power in Germany, Wiene fled into exile.

The Famous Woman: The Famous Woman (German: Die berühmte Frau) is a 1927 German silent drama film directed by Robert Wiene and starring Lili Damita, Fred Solm and Warwick Ward.  It was based on the play "Die Tänzerin" by Melchior Lengyel, who also wrote the film's screenplay.  While performing in Barcelona, a dancer falls in love with a Spanish aristocrat.  He proposes marriage to her providing she give up her profession.  She agrees and the wedding preparations begin.  When her troupe returns to Spain, however, she is drawn back to her true calling as a dancer and her aristocratic lover reluctantly allows her to go free.  Damita's performance was particularly praised, as was the cinematography of Otto Kanturek who had done location shooting in Barcelona.

The Adventure of Doctor Kircheisen: The Adventure of Doctor Kircheisen (German: Das Abenteuer des Dr. Kircheisen) is a 1921 German silent drama film directed by Rudolf Biebrach and stars Lotte Neumann, Hermann Thimig and Hans Marr.  The script was by Robert Wiene, based on the novel "Das Mangobaumwunder" by Paul Frank and Leo Perutz.

Folly of Love: Folly of Love (German: Unfug der Liebe) is a 1928 German silent comedy film directed by Robert Wiene and starring Maria Jacobini, Jack Trevor and Betty Astor.  While several of Wiene's previous films had met with mixed responses, "Folly of Love" was universally praised by critics.  It was Wiene's last silent film.  His next work was the 1930 sound film "The Other".

Supporting paragraphs: A Woman's Revenge (1921 film) Vera Karalli
Answer: ballet