Refer to the input text as context and select the correct relationship between 'Eurogroup' and 'Jeroen Dijsselbloem' from the available options.
Options: headquarters location, brand, chairperson, industry

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