Utilize the input text as a context reference, choose the right relationship between Sanofi and Regeneron Pharmaceuticals 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.

Sanofi and partner Regeneron Pharmaceuticals Inc. won FDA approval for that drug last month.

Answer: owner_of