Utilize the input text as a context reference, choose the right relationship between Vodafone 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.
Text: But with Vodafone chucking massive sums to improve its data and voice capabilities, not to mention embarking on massive acquisitions like those of multi-services providers Kabel Deutschland and Ono , the London firm's revenues performance has received a huge boot in the right direction.
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headquarters_location
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