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Major activities In 1947 , at the age of 31 , Blanchard joined the International Refugee Organization , staying there until the organization ceased to exist in 1952 , after which he aided in the formation of its successor agencies , the International Organization for Migration and the United Nations High Commissioner for Refugees .
 Blanchard, International Refugee Organization, International Organization for Migration, United Nations High Commissioner for Refugees
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Blanchard, International Refugee Organization, International Organization for Migration, United Nations High Commissioner for Refugees