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R.C. Singh is a member of the Rajya Sabha for the West Bengal constituency , and a member of the Communist Party of India .
 R.C. Singh, West Bengal, Communist Party of India
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 R.C. Singh, West Bengal, Communist Party of India