What is the relationship between SABMiller 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) - Brewer Anheuser-Busch InBev (ABI.BR) may raise its takeover offer for SABMiller (SAB.L) ahead of Wednesday's bid deadline, a source close to the matter said on Sunday.

Answer: headquarters_location