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On March 12 , Ainavillo 's army of sixty thousand warriors advanced against the fort at Penco in three separate bodies with 5,000 skirmishers covering their advance and deployment .
 Ainavillo, Penco
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ainavillo, Penco