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He became inspired by stories of heroism by revolutionaries like Bhagat Singh , Sukhdev Thapar and Shivaram Rajguru , who were executed while he was in the jail .
 Bhagat Singh, Sukhdev Thapar, Shivaram Rajguru
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bhagat Singh, Sukhdev Thapar, Shivaram Rajguru