Utilize the input text as a context reference, choose the right relationship between EU and European Union from the options. Options: 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.

BRUSSELS, Aug 30 (Reuters) - European Union ministers have been called to an extraordinary EU meeting on Sept. 14 to discuss a huge surge in irregular immigration, as European leaders struggle to define a coherent response to the crisis.

Answer: operator