Analyze the relationship between 'Petrofac' and 'Public Limited Company' within the context of the input sentence.
Options: member of, legal form, parent organization, owner of

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 ) .
legal form