What is the relationship between Tullow Oil and oil company 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.

Tullow Oil (LSE: TLW.L - news ) led the fallers, declining 8.67% to 222.20p while fellow oil company Premier Oil (LSE: PMO.L - news ) was not far behind, falling by 7.81% to 116.80p.

Answer: industry