Utilize the input text as a context reference, choose the right relationship between 'Tullow Oil' and 'LONDON' from the options.
Options: headquarters location, subsidiary, publisher, parent organization

LONDON (ShareCast) - (ShareCast News) - Tullow Oil (LSE: TLW.L - news ) was under pressure after saying gas exports from the Jubilee Field to the Ghana Gas plant at Atuabo have been suspended since 3 July due to technical issues and is expected to resume mid-August.
headquarters location