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Unlike his fellow-villager , the notable West Belarusian politician and scientist Jan Stankievič , Adam refused to cooperate with the Germans after their invasion in Poland .
 Belarusian, Jan Stankievič, Adam, Poland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Belarusian, Jan Stankievič, Adam, Poland