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Robert William " Dabbs " Greer ( April 2 , 1917 – April 28 , 2007 ) was an American actor who performed many diverse supporting roles in film and television for some fifty years .
 Dabbs, Greer, American
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dabbs, Greer, American