What is the relationship between Vodafone and Ono 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.

Vodafone agreed to buy Ono for 7.2 billion euros ($10 billion) in March 2014, one of a number of recent takeover deals in Spain's telecom sector.

Answer: subsidiary