Refer to the input text as context and select the correct relationship between 'Premier Oil' and 'LONDON' from the available options.
Options: developer, publisher, distributed by, 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