What is the relationship between 'Tullow Oil' and 'oil company' in the context of the input sentence.
Options: headquarters location, distributed by, industry, platform

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.
industry