Eurogroup chief Jeroen Dijsselbloem insisted on the need to build trust after six months of tortuous debt deal negotiations and a sudden referendum in which Greeks overwhelmingly rejected creditors' bailout terms.
Refer to the input text as context and select the correct relationship between 'Eurogroup' and 'Jeroen Dijsselbloem' from the available options.
Options: subsidiary, chairperson, creator, position held