What is the relationship between 'Rupert Murdoch' and '21st Century Fox' in the context of the input sentence.
Options: manufacturer, currency, owner of, position held

Media company 21st Century Fox reported Tuesday that the total compensation for Executive Co-Chairman Rupert Murdoch and Chief Executive James Murdoch declined in the fiscal year ended in June, because of a decline in stock awards and non-equity incentive compensation.
owner of