Analyze the relationship between 'Vodafone' and 'Ono' within the context of the input sentence.
Options: headquarters location, subsidiary, industry, position held

Tough competition and falling prices during a recession have driven multibillion takeover deals in Spain with France's Orange (Taiwan OTC: 4554.TWO - news ) buying telecoms group Jazztel (Other OTC: JAZTF - news ) in September and Vodafone buying cable operator Ono in March.
subsidiary