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.
Analyze the relationship between 'Satya Nadella' and 'Microsoft' within the context of the input sentence.
Options: business division, parent organization, employer, chairperson