What is the relationship between Janet Yellen and President 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.

Federal Reserve Chair Janet Yellen and Federal Reserve Bank of St. Louis President James Bullard give welcome remarks before the Third Annual Community Banking Research and Policy Conference on Wednesday.

Answer: position_held