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It attracted signatures from notable figures including historian Gar Alperovitz , social critic Noam Chomsky , whistle blower Daniel Ellsberg , physicist Joseph Rotblat , writer Kurt Vonnegut , producer Norman Lear , actor Martin Sheen and filmmaker Oliver Stone .
 Gar Alperovitz, Noam Chomsky, Daniel Ellsberg, Joseph Rotblat, Kurt Vonnegut, Norman Lear, Martin Sheen, Oliver Stone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gar Alperovitz, Noam Chomsky, Daniel Ellsberg, Joseph Rotblat, Kurt Vonnegut, Norman Lear, Martin Sheen, Oliver Stone