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When he was three years old , a high fever caused him to suffer from serious polio aftereffects , and that year he was adopted by a welfare institution .
 a welfare institution, he, him, he
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 a welfare institution, he, him, he