Utilize the input text as a context reference, choose the right relationship between Worldpay and Bain Capital 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.

Advent and Bain Capital bought Worldpay from Royal Bank of Scotland (LSE: RBS.L - news ) in 2010 for £1.7bn.

Answer: parent_organization