2294
` ` It will determine the way Britain and the world confront the central security threat of the 21st century ; the development of the United Nations ; the relationship between Europe and the United States ; the relations within the European Union ; and the way that the United States engages with the rest of the world , ' ' said Blair .
 Britain, Europe, the United States, the European Union, the United States, the United Nations, Blair, the world, the world
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 Britain, Europe, the United States, the European Union, the United States, the United Nations, Blair, the world, the world