Analyze the relationship between 'Eurogroup' and 'Jeroen Dijsselbloem' within the context of the input sentence.
Options: stock exchange, position held, subsidiary, chairperson

1619 - The head of the Eurogroup Jeroen Dijsselbloem said he was "certain" there would be problems with Greece in the years to come after the euro zone's bailout fund decided to open talks with Greece on a third bailout programme.
chairperson