206493
During this period of time , Shu was quite active in various social and political activities and communities , and it 's said that he even once joined the Communist Party USA .
 Shu, Communist Party USA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Shu, Communist Party USA