What is the relationship between Eurogroup and Jean-Claude Juncker 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.

He is due to hold a teleconference on Monday morning with European Commission head Jean-Claude Juncker and European Union president Donald Tusk and the head of the Eurogroup of eurozone finance ministers.

Answer: chairperson