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Megistias ( Greek : Μεγιστίας , " the greatest one " ) or Themisteas ( ) was a soothsayer from Acarnania who died in the Battle of Thermopylae .
 Megistias
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Megistias