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Raymond Pace Alexander ( October 19 , 1898 - November 24 , 1974 ) was a civil rights leader , Harvard-educated lawyer and the first African American judge appointed to the Court of Common Pleas in Philadelphia , Pennsylvania .
 Alexander
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alexander