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Since Hamai and the mayors of Hiroshima that followed have tried to become leaders of international public opinion on issues such as peace and nuclear disarmament .
 Hamai, Hiroshima
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hamai, Hiroshima