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Rendra performed Shakespeare , Brecht , and the ancient Greek-oriented socially critical pieces and as a keen student of the Cino-Indonesian martial art Silat Bangau Putih/White Crane Silat Persatuan Gerak Badan , , Rendra always looked a lot younger than his age and played Hamlet when he was well into his sixties .
 Rendra, Shakespeare, Brecht, Rendra
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rendra, Shakespeare, Brecht, Rendra