What is the relationship between 'Apple Inc' and 'Tim Cook' in the context of the input sentence.
Options: chief executive officer, legal form, business division, original broadcaster

SAN FRANCISCO (Reuters) - Apple Inc (AAPL.O) Chief Executive Tim Cook unveiled a new version of its Apple TV product with an app store and a voice-controlled remote control, part of a trio of announcements aimed at revamping its product line.
chief executive officer