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Carlos Manuel Echandi Lahmann ( October 20 , 1900 – August 23 , 1938 ) was a Costa Rican surgeon murdered by Beltrán Cortés .
 Carlos, Echandi, Costa, Beltrán Cortés
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Carlos, Echandi, Costa, Beltrán Cortés