Utilize the input text as a context reference, choose the right relationship between daughter and London from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Real estate tycoon Niranjan Hiranandani is facing legal trouble from his daughter Priya Hiranandani-Vandrevala, who sought arbitration in London in 2009, claiming that her father and brother Darshan violated a 2006 family agreement.

Answer: location_of_formation