67885
History Mongolian National Youth Movement had began with an organization on August 25 , 1921 of a formal group named “ Mongolian Revolutionary Youth Union ” ( MRYU ) which first comprised only of 17 members .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None