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

Now in monogenic disorders, Sanofi Genzyme pioneered this field, starting with enzyme replacement therapies to address a range of lysosomal storage diseases.

Answer: parent_organization