5793
The Greek words " oida " ( , " ( I ) know " ) and " eidos " ( , " species " ) , a thing seen , have the same root as the word " idea " ( ) , a thing ἰδείν to see .
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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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