What is the relationship between National Geographic Partners and joint venture in the context of the input sentence. Choose an answer from: 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.

The new expanded joint venture will operate as National Geographic Partners and will combine the National Geographic television channels with National Geographic's other digital, media and publishing, travel and licensing assets.

Answer: legal_form