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Las Traumas and Navarro competed in the 2010 tournament for the vacant Distrito Federal Trios Championship , but lost in the first round to the team of Black Terry , Dr. Cerebro and El Hijo del Signo .
 El Hijo del Signo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 El Hijo del Signo