What is the relationship between Elon Musk and Chief Executive Officer 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.
Text: "I think we got a little carried away with the X," Chief Executive Officer Elon Musk told reporters ahead of a launch event near the company's Fremont factory, where luxury Model Xs have been moving down the production line in recent weeks, nearly two years behind the company's original schedule.
user
position_held
assistant