In the context of the input sentence, determine the relationship between 'Premier Oil' and 'LONDON'.
Options: publisher, headquarters location, distributed by, developer

LONDON (ShareCast) - (ShareCast News) - Premier Oil (LSE: PMO.L - news ) and its joint venture partners Talos Energy and Sierra Oil & Gas have been awarded two blocks as part of Mexico's Round 1 shallow water licensing round.
headquarters location