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

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