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He also had a small incursion in television as presenter of " Grandes pensadores del siglo XX " ( " Greatest thinkers of 20th-century " ) in Encuentro , in years 2009 – 2010 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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