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The Law of Free Birth ( 1871 ) , also known as Rio Branco Law , named after its champion , Prime Minister José Paranhos , Viscount of Rio Branco , was passed by the Brazilian Parliament .
 Rio Branco, José Paranhos , Viscount of Rio Branco
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rio Branco, José Paranhos , Viscount of Rio Branco