Question: Where was the entertainment company that produced "Night Nurse" headquartered? 

Context paragraphs:
Night Nurse (horse): Night Nurse (26 May 1971 - 1998) was an Irish-bred English-trained National Hunt racehorse.  Night Nurse garnered 35 wins, winning a total of £174,507 viz.  He won 3 races on the flat at 3 and 4-years old and placed 3 times; he also won 32 National Hunt races, 19 wins over hurdles and 13 wins in steeplechases from 64 starts.  He was awarded the highest Timeform rating ever given to a hurdler and has been acclaimed amongst the greatest ever hurdlers.

Rosie Dixon – Night Nurse: Rosie Dixon – Night Nurse is a 1978 British comedy film directed by Justin Cartwright and starring Debbie Ash, Carolyne Argyle, Beryl Reid and John Le Mesurier.  It was based on a novel by Christopher Wood.

Ralf Harolde: Ralf Harolde (May 17, 1899 – November 1, 1974) was an American character actor, who often played gangsters.  Between 1920 and 1963, he appeared in 99 films, including "Jimmy the Gent", "Night Nurse", "Baby Take a Bow", "A Tale of Two Cities", "Our Relations", and "Murder, My Sweet".

Night Nurse (1931 film): Night Nurse is a 1931 American pre-Code crime drama and mystery film produced and distributed by Warner Bros. and directed by William A. Wellman.  The film stars Barbara Stanwyck, Ben Lyon, Joan Blondell, Clark Gable and Vera Lewis.  It was based on the 1930 novel of the same name, written by Grace Perkins, later Mrs. Fulton Oursler (under the pen name Dora Macy).  The film was considered risqué at the time of its release, particularly the scene where Stanwyck is seen in her lingerie.  Gable portrays a vicious chauffeur gradually starving two little girls to death.

Claire Temple (Marvel Cinematic Universe): Claire Temple is a character portrayed by Rosario Dawson in the television series of the Marvel Cinematic Universe (MCU), based on the comic characters Claire Temple and Night Nurse.  A nurse who gives medical aid to vigilantes, she first appeared in the first season of "Daredevil" (2015–).  Dawson then signed a deal to return for the second season of the series, as well as potentially appear in any other Marvel Netflix series.  She has since reprised the role in "Jessica Jones", "Luke Cage", "Iron Fist", and "The Defenders".  The character has also appeared in a "Jessica Jones" tie-in comic.

Night Nurse (comics): Night Nurse is the name of a Marvel Comics comic book series published in the early 1970s, as well as the alter ego later taken on by one of its characters, Linda Carter.  Carter was one of three central characters who first appeared in "Night Nurse" #1 (cover-dated November 1972), though she was previously the lead of another Marvel series, "Linda Carter, Student Nurse", published in 1961.  Carter later adopted the name "Night Nurse" for herself, and in this incarnation, first appeared in "Daredevil" #58 (May 2004), she is as a medical professional specializing in helping injured superheroes.

Night Nurse (album): Night Nurse is a 1982 studio album by Gregory Isaacs.

Night Nurse (Cascada song): "Night Nurse" is the fourth overall single performed by German dance trio Cascada, from their fourth studio album, Original Me (2011).  The song was written by Tony Cornelissen, Manuel Reuter and Yann Peifer, with production helmed by DJ Manian and Yanou.  "Night Nurse" was released to the internet in late summer of 2010 and featured on the compilation "Clubland 18," released on November 7, 2010.  "Night Nurse" uses Auto-Tune on the uncredited vocals of German singer and rapper Tony T. who was brought by DJ Manian and Yanou of their Dance Project R.I.O..  Lyrically, the song is about being feverish on the dancefloor.  The music video was released on the All Around the World YouTube account and on Clubland TV in November 2010 which features Horler and some male backup dancers in a warehouse party.  Horler appears in some scenes painted with numerous colors and a huge spider web.

Warner Bros.: Warner Bros.  Entertainment Inc. (previously incorporated as Warner Brothers Pictures, Inc. and colloquially known as Warner Bros. and Warner Bros.  Pictures) is an American entertainment company that is a division of Time Warner and is headquartered in Burbank, California.  It is one of the "Big Six" major American film studios.

The Night Nurse: The Night Nurse is a 1977 Australian television film about the relationship between a former opera star and her night nurse.

Supporting paragraphs: Night Nurse (1931 film) Warner Bros.
Answer: Burbank, California