What is the relationship between 'Afren' and 'LONDON' in the context of the input sentence.
Options: parent organization, owner of, product/material produced, headquarters location

LONDON (ShareCast) - (ShareCast News) - Embattled oil explorer Afren (LSE: AFR.L - news ) suspended its shares amidst uncertainty over its financial position, though analysts were sceptical about the real reasons for the move.
headquarters location