Fidelity National Information Services Inc. agreed to buy SunGard for $5.1 billion in cash and stock, a decade after a group of private-equity firms acquired the financial software company in one of the signature deals of the buyout boom that preceded the financial crisis.
Refer to the input text as context and select the correct relationship between 'SunGard' and 'software' from the available options.
Options: chief executive officer, employer, product/material produced, currency