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A fierce opponent of the Nazis , he helped hiding Jewish persecutees to protect them from deportation to the extermination camp s. After World War II he was appointed mayor of Berlin - Wilmersdorf in 1946 .
 Berlin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Berlin