Utilize the input text as a context reference, choose the right relationship between National Geographic Society and National Geographic from the options. Options: 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.

On September 9, 2015, Twenty-First Century Fox, Inc. (the "Company") and The National Geographic Society (the "Society") issued a joint press release announcing that they have reached an agreement to expand their partnership through which they have owned and operated the properties in National Geographic Channels, a joint venture of domestic and international cable television channels.

Answer: owner_of