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.

Presidents Jean-Claude Juncker of EC, Doland Tusk of the European Council, Jeroen Dijsselbloem of the Eurogroup and Mario Draghi of the ECB took part in the meeting, Efe news agency reported.

Answer: chairperson