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It is during his time in St Xaviers , that Sudipto got involved in serious theatre with another stalwart of Bengali theatre , Ramaprasad Banik .
 Sudipto, Ramaprasad Banik
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sudipto, Ramaprasad Banik