What is the relationship between Dixons Carphone and LONDON in the context of the input sentence. Choose an answer from: 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.

LONDON (Reuters) - British electrical goods and mobile phone retailer Dixons Carphone has sealed a deal with Sprint Corp. , the U.S. mobile network operator, that could see it open and manage up to 500 Sprint-branded stores in the United States.

Answer: headquarters_location