What is the relationship between 'SABMiller' and 'LONDON' in the context of the input sentence.
Options: parent organization, headquarters location, distributed by, publisher

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.
headquarters location