What is the relationship between Apple Inc and Tim Cook in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

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.

Answer: chief_executive_officer