272357
Artists were barred from work on the basis of their alleged membership in or sympathy toward the American Communist Party , involvement in liberal or humanitarian political causes that enforcers of the blacklist associated with communism , and/or refusal to assist investigations into Communist Party activities ; some were blacklisted merely because their names came up at the wrong place and time .
 Artists, American Communist Party, Communist
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Artists, American Communist Party, Communist