Analyze the relationship between 'National Geographic Society' and 'National Geographic' within the context of the input sentence.
Options: owned by, location of formation, owner of, industry

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.
owner of