314002
Seven " debate " topics are known from the Sumerian literature , falling in the category of ' disputation s ' ; some examples are : The Debate between Winter and Summer ; Debate between sheep and grain ; the Tree and the Reed ; bird and fish ; and The Dispute between Silver and Mighty Copper , etc. .
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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:
 None