What is the relationship between Tullow Oil and LONDON in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

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.

Answer: headquarters_location