What is the relationship between Eurogroup and Jeroen Dijsselbloem 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.

After the call, Eurogroup chief Jeroen Dijsselbloem made clear there were "no grounds for further talks at this point" because of the Greek government's refusal to call off the referendum.

Answer: chairperson