Take context from the input text and decide on the accurate relationship between 'Telenet' and 'Liberty Global' from the options provided.
Options: employer, parent organization, developer, member of

-- Cable telecoms company Liberty Global's Belgian subsidiary Telenet to buy mobile network operator Base from Dutch group KPN (notified Aug. 17/deadline extended to Oct. 5 from Sept. 21 after Liberty Global offered commitments)
parent organization