What is the relationship between Sergio Marchionne and Fiat 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.

In particular, they have leapt more than 80 percent since October, when CEO Sergio Marchionne announced plans to spin off Ferrari and give a big chunk of the highly-prized sports car maker's shares to Fiat Chrysler Automobiles (FCA) investors.

Answer: employer