91152
However , by the end of World War I the colonial empires had become very popular almost everywhere in Europe : public opinion had been convinced of the needs of a colonial empire , although most of the metropolitans would never see a piece of it .
 Europe
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Europe