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In May 1811 , the revolutionary José Gervasio Artigas defeated the Spanish in the Banda Oriental at the Battle of Las Piedras .
 José Gervasio Artigas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 José Gervasio Artigas