Refer to the input text as context and select the correct relationship between 'Worldpay' and 'Advent International' from the available options.
Options: manufacturer, developer, member of, parent organization

Headquartered in London, Worldpay was carved out of RBS (LSE: RBS.L - news ) five years ago and established as a standalone business by private equity firms Advent International and Bain Capital - who paid £1.7bn for the business.
parent organization