Utilize the input text as a context reference, choose the right relationship between Maersk and COPENHAGEN 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.
Text: COPENHAGEN Aug 31 Maersk Oil has received approval by the UK's Oil & Gas Authority to develop the largest gas field discovered in the UK North Sea in more than a decade, the Danish oil company said on Monday.
user
location_of_formation
assistant