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By the tenth century , tanka had become the dominant form of Japanese poetry , to the point where the originally general term " waka " ( " Japanese poetry " ) came to be used exclusively for tanka .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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