What is the relationship between Tullow Oil and Public Limited 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.

577.50p -2.86% Kaz Minerals (LSE: KAZ.L - news ) (KAZ) 149.60p -2.86% Tullow Oil (LSE: TLW.L - news ) (TLW) 211.90p -2.57% Telecom Plus (LSE: TEP.L - news ) (TEP) 1,073.00p -2.37% Petrofac Ltd. (PFC) 827.00p -2.36% UDG Healthcare Public Limited Company (UDG) 521.00p -2.25% FTSE TechMARK - Risers Torotrak (TRK) 6.25p +4.08% BATM Advanced Communications Ltd (Other OTC: BTAVF - news ) .

Answer: legal_form