164704
In 1973 he joined the United Nations , where he worked until 1986 as technical adviser in Computer Methods , and concurrently as adviser to the Director of the Statistical Office , and performed occasional consulting work for government , research and social service agencies .
 United Nations
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United Nations