What is the relationship between EU and European Union 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.

With Greece due to pay the European Central Bank 3.5 billion euros ($3.9 billion) next Monday, ministers are looking at whether they could recycle interest payments already made by Greece to euro-zone central banks, tap a fund managed by all 28 European Union governments, give Greece more time to pay, or organize bilateral loans from individual EU governments.

Answer: operator