33204
Later , in the 1920 s and 1930 s , the eugenic policy of sterilizing certain mental patients was implemented in other countries including Belgium , Brazil , Canada , Japan and Sweden .
 Belgium, Brazil, Canada, Japan, Sweden
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Belgium, Brazil, Canada, Japan, Sweden