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More than 40 , 000 workers were back at their jobs Thursday following a 1 - day walkout that closed social welfare offices and crippled public medical services .
 social welfare offices, More than 40 , 000 workers, their
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:
 social welfare offices, More than 40 , 000 workers, their