Utilize the input text as a context reference, choose the right relationship between Eurogroup and Jean-Claude Juncker from the options. Options: 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