Lupu Pick
Lupu Pick (2 January 1886 – 7 March 1931) was a German actor, film director, producer and screenwriter of the silent era.
He appeared in 50 films between 1910 and 1928.
Born in Romania, Pick's father was a Jewish Austrian, his mother, of Romanian origin.
He began as a stage actor in Hamburg, Flensburg and Berlin before 1910.
In 1917 he founded the film company Rex-Film AG.
He served on the board of the Film Association of Industrialists ("Vorstand des Verbandes der Filmindustriellen"), SPIO and the Film Directors Association of Germany ("Verbandes der Filmregisseure Deutschlands") and worked intensively to establish the union-based umbrella organization of Filmmakers in Germany ("Filmschaffenden Deutschlands") (Dacho).
He was the organization's first chairman.
Pick was married to actress Edith Posca.
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A Knight in London
A Knight in London  is a 1928 British-German silent drama film directed by Lupu Pick and starring Lilian Harvey, Ivy Duke and Robin Irvine.
It was one of a significant number of co-productions between the two countries in the late 1920s.
The film's direction and the cinematography by Karl Freund were widely praised.
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Question: Who is the spouse of the director of film A Knight In London?
Answer: Edith Posca