Analyze the relationship between 'Liberty Global' and 'Telenet' within the context of the input sentence.
Options: founded by, platform, owner of, legal form

-- Cable telecoms company Liberty Global (NasdaqGS: LBTYA - news ) 's Belgian subsidiary Telenet (Other OTC: TLGHF - news ) 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)
owner of