In the context of the input sentence, determine the relationship between 'KPN' and 'Base'.
Options: position held, distributed by, chairperson, owner of

-- 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 Sept. 21)
owner of