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He represented the Italian Republican Party in the Constituent Assembly of Italy from 1946 to 1948 and the Italian Socialist Party in the Chamber of Deputies from 1948 to 1953 .
 Italian Republican Party, Italian Socialist Party
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Italian Republican Party, Italian Socialist Party