Refer to the input text as context and select the correct relationship between 'EU' and 'European Union' from the available options.
Options: creator, operator, chief executive officer, brand

\r The Greek Referendum Outcomes Explained in One Chart \r What it’s Like to be a Stock Broker in Greece \r EU Doubts The creditor institutions still view the July 5 referendum as a potential barrier to agreement, according to a European Union official.
operator