Question: In which city did the brother of Karan Kapoor run the Prithvi Theatre?
Context: Jennifer Kapoor (née Kendal, 28 February 1933 – 7 September 1984) was an English actress and the founder of the Prithvi Theatre.  She was nominated for the BAFTA Award for Best Actress in a Leading Role for the 1981 film "36 Chowringhee Lane".  Her other film appearances included "Bombay Talkie" (1970), "Junoon" (1978), "Heat and Dust" (1983), and "Ghare Baire" (1984). Sultanat is a 1986 Bollywood film written and directed by Mukul S. Anand.  The film stars Dharmendra, Sunny Deol, Sridevi, Amrish Puri, Shakti Kapoor, Tom Alter and marked the debut of Karan Kapoor (son of Shashi Kapoor) and Juhi Chawla.  It was not a success at the box-office.  It was the first film in which Dharmendra appeared alongside his son Sunny Deol. He was the first artistic director of the Prithvi Theatre in Mumbai and in 1983 was head of the Prithvi Theatre Festival with Jennifer Kapoor and Akash Khurana.  He started with productions like the early comedy "All the Best" and "Saalgirah" (1993), written by playwright Javed Siddiqui with Anupam Kher and Kirron Kher, which incidentally became her first acting performance during her comeback after a sabbatical.  In 1992, American playwright and novelist, A. R. Gurney's play "Love Letters" was adapted to Urdu and Indian context by Javed Siddiqui and first performed by veteran actors, Shabana Azmi and Farooq Sheikh at the Jennifer Kapoor Festival in Prithvi theatre in February 1992, under his direction, where for one-and-a-half hours, they read the letters describing the relationship between two characters Amrita and Zulfikar, over a period of 35 years.  The play went on tour to many parts of the world, including US, Europe and Pakistan. Loha is a 1987 Hindi film directed by Raj N. Sippy.  It was released in India on 23 January 1987.  It stars Dharmendra, Shatrughan Sinha, Karan Kapoor, Madhavi, Mandakini and Amrish Puri.  The film was one of that year's highest grossing films.  The film became Dharmendra's first hit of the year 1987, where he went on to deliver 7 more outright hits and hence, represented one of his best career years as well as an all-time record year for any Hindi film star.  The film's music became popular also, most notably, ""Isa Pir na musa pir, sabse bada hain paisa pir"" picturised beautifully on the male leads of the film. Sanjna Kapoor (born 27 November 1967) is an Indian theatre personality and former Indian film actress of British and Indian descent.  She is the daughter of Shashi Kapoor and the late Jennifer Kendal.  She ran the Prithvi Theatre in Mumbai from 1993.  to February 2012. Prithvi Theatre is one of Mumbai's best known theatres.  It was built by Shashi Kapoor and his wife Jennifer Kapoor in memory of Prithviraj Kapoor, Shashi's father, who had dreamt of having a "home" for his repertory theatre company, Prithvi Theatres, belongs to the Kapoor family, one of the most influential actor and director families in Bollywood.  Prithviraj Kapoor founded 'Prithvi Theatres', a travelling theatre company in 1944.  The company ran for sixteen years.  Ved Segan was the architect who designed and built the Theatre with the supervision of Jennifer Kapoor.  Jennifer, (Trustee) supervised the building and running of the theatre until her death in 1984.  In 1978 Prithvi Theatre opened in Juhu, Mumbai.  Shashi Kapoor is the Managing Trustee, the daily affairs are looked after by Kunal Kapoor (Trustee) with a small but efficient team.  Prithvi Theatre has shows every day of the year (closed Mondays), hosts an annual Summertime programme of workshops and plays for children, the Memorial Concert on 28 February, an annual Theatre Festival in November, and many partnership programmes promoting language, poetry, international cinema & documentaries, performing arts – which are free to the public. Tumhari Amrita is a epistolary play directed by Feroz Abbas Khan.  Its original cast includes Shabana Azmi and Farooq Sheikh.  It is an Indian context adaptation of A. R. Gurney's American play, "Love Letters" (1988), and the Hindi/Urdu version was created in 1992 by playwright Javed Siddiqui.  After its première at Prithvi Theatre, Mumbai in February 1992, it has been staged at venues across India, Europe, US and Pakistan. Karan Kapoor (born 18 January 1962) is a former Indian film actor and model of British and Indian descent.  He is the son of Indian Bollywood International Actor Shashi Kapoor and his India settled (late) British Actress Jennifer Kendal.  His paternal grandfather was Prithviraj Kapoor and his paternal uncles are Raj Kapoor and Shammi Kapoor.  His elder brother Kunal Kapoor and sister Sanjana Kapoor have also acted in some films but like him they were not very successful.  His maternal grandparents, Geoffrey Kendal and Laura Kendal, were actors who toured India and Asia with their theatre group, Shakespeareana, performing Shakespeare and Shaw.  The Merchant Ivory film, "Shakespeare Wallah", was loosely based on the family, which starred his father and his aunt, actress Felicity Kendal.  Karan later moved towards photography and decided to be a part of this profession though he worked as an actor too. Kunal Karan Kapoor (born 22 August 1982 in Mumbai, India) is an Indian actor.  In 2013, he won the 'Best Actor(male)-Popular' for Na Bole Tum Na Maine Kuch Kaha at the Indian Telly Awards for which he is highly noted.  His role as Mohan Bhatnagar gave him a huge fan base and made him the most perfect telly actor.  He went on to become the "King of expressions" also.  At 2017 he made his return after two years of gap, and recently" he has made his (new album) 'Adda with his co-actor Ritabhari Chakraborty. Shaukat Kaifi (also credited as Shaukat Azmi) is an Indian social activist, noted theater and film actress.  She was married to poet, Kaifi Azmi, and through her career associated with the Indian People's Theatre Association (IPTA), the Progressive Writers Association and Prithvi Theatre.
Answer: Mumbai