What is the relationship between 'daughter' and 'London' in the context of the input sentence.
Options: location of formation, legal form, distributed by, manufacturer

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.
location of formation