Utilize the input text as a context reference, choose the right relationship between Citigroup and insurance 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.

The “bad-bank” unit of Citigroup Inc., Citi Holdings for more than six years has been the repository for businesses the banking giant wanted to dump: its retail brokerage and life insurance unit, an array of toxic subprime loans, even a stake in a Mexican auto supplier.

Answer: product_or_material_produced