What is the relationship between Premier 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.

401.30p -2.31% Barclays (Swiss: BARC.SW - news ) (BARC) 254.45p -2.30% Standard Chartered (HKSE: 2888.HK - news ) (STAN) 724.10p -2.29% HSBC Holdings (HKSE: 0005.HK - news ) (HSBA) 491.10p -2.27% FTSE 250 - Risers UDG Healthcare Public Limited Company (UDG) 524.00p +6.29% IP Group (LSE: IPO.L - news ) (IPO) 263.20p +4.94% Allied Minds (Other OTC: ALLWF - news ) (ALM) 519.00p +4.03% Centamin (DI (KSE: 003160.KS - news ) ) (CEY) 64.95p +4.00% CLS Holdings (LSE: CLI.L - news ) (CLI) 1,858.00p +2.99% Genus (GNS) 1,455.00p +2.46% Riverstone Energy Limited (RSE) 952.00p +2.37% Vectura Group (LSE: VEC.L - news ) (VEC) 178.70p +2.11% Acacia Mining (LSE: ABG.L - news ) (ACA) 248.40p +2.05% Euromoney Institutional Investor (ERM) 1,050.00p +1.94% FTSE 250 - Fallers Premier Oil (LSE: PMO.L - news ) (PMO) 79.30p -5.54% Kaz Minerals (LSE: KAZ.L - news ) (KAZ) 151.30p -4.96% Northgate (NTG) 480.60p -3.88% Premier Farnell (LSE: PFL.L - news ) (PFL) 108.00p -3.57% Tullow Oil (LSE: TLW.L - news ) (TLW) 204.00p -3.32% Rotork (Frankfurt: RO41.F - news ) (ROR) 186.50p -3.17% Elementis (ELM) 219.30p -3.09% Victrex plc (LSE: VCT.L - news ) (VCT) 1,705.00p -2.79% Man Group (LSE: EMG.L - news ) (EMG) 160.50p -2.67% Debenhams (DEB) 74.50p -2.61% FTSE TechMARK - Risers Oxford Instruments (Other OTC: OXGGY - news ) (OXIG) 606.00p +2.36% Oxford Biomedica (LSE: OXB.L - news ) (OXB) 8.80p +1.62% KCOM Group (LSE: KCOM.L - news ) (KCOM) 91.50p +0.83% IShares Euro Gov Bond 7-10YR UCITS ETF (IEGM) € 201.53 +0.82% Spirent Communications (Other OTC: SPMYY - news ) (SPT (Taiwan OTC: 8431.TWO - news ) ) 76.00p +0.66% Consort Medical (Other OTC: CSRMF - news ) (CSRT) 929.50p +0.60% Skyepharma (SKP) 348.25p +0.58% SDL (SDL (LSE: SDL.L - news ) ) 369.50p +0.41% E2V Technologies (LSE: E2V.L - news ) (E2V) 235.00p +0.32% FTSE TechMARK - Fallers BATM Advanced Communications Ltd (Other OTC: BTAVF - news ) .

Answer: legal_form