6556
He testified on March 26 , 1953 , before the House Un-American Activities Committee about his own activities , but refused to cooperate with the committee .
 organization: House Un-American Activities Committee
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: House Un-American Activities Committee