Take context from the input text and decide on the accurate relationship between 'Eurogroup' and 'Jeroen Dijsselbloem' from the options provided.
Options: brand, industry, chairperson, headquarters location

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.
chairperson