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A philosopher of the Epicurean school , Lucretius believed the world was composed solely of matter and void and that all phenomena could be understood as resulting from purely natural causes .
 Epicurean, Lucretius
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Epicurean, Lucretius