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Well , recently , that is , , new Foreign Minister Aso proposed a theory of joint development , that is , to postpone [ [ the issue of sovereignty of the northern ] ] and to jointly develop the , , four islands .
 Aso, four
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Aso, four