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Beauchef decided to head south in order to secure Osorno , to expel the remains of the royalist forces from the Chilean mainland and to take possession of the area south to the Maullín River , so that the Spanish would not be able to reoccupy Valdivia by land .
 Beauchef, Osorno, Maullín, Valdivia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Beauchef, Osorno, Maullín, Valdivia