Utilize the input text as a context reference, choose the right relationship between Cinven and private equity 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.
Text: City sources named the private equity groups BC Partners, Cinven and KKR as possible buyers, although it is unclear whether any of those firms will pursue takeover bids.
user
product_or_material_produced
assistant