7011
For several years , the United Nations Development and Planning Office has , as always , supported the Tumen River development , and actively helped the three countries : China , Russia and North Korea , to attract world business and to help implement feasibility studies for development projects .
 date: several years; organization: the United Nations Development and Planning Office; location: Tumen River; geographical social political: China; geographical social political: Russia; geographical social political: North Korea
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 date: several years; organization: the United Nations Development and Planning Office; location: Tumen River; geographical social political: China; geographical social political: Russia; geographical social political: North Korea