Utilize the input text as a context reference, choose the right relationship between 'Vodafone' and 'Ono' from the options.
Options: position held, industry, subsidiary, headquarters location

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