What is the relationship between Alcoa and Klaus Kleinfeld 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 the last few years, we have successfully transformed Alcoa to create two strong value engines that are now ready to pursue their own distinctive strategic directions," Chairman and CEO Klaus Kleinfeld said in a statement.
director_/_manager