Seated with Obama and Xi at the head table were Apple (AAPL.O) CEO Tim Cook, Satya Nadella of Microsoft (MSFT.O), Facebook's (FB.O) Mark Zuckerberg and Salesforce.com's (CRM.N) Marc Benioff.
Utilize the input text as a context reference, choose the right relationship between 'Satya Nadella' and 'Microsoft' from the options.
Options: employer, parent organization, chairperson, business division