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James Buster Clarkson ( March 13 , 1915 – January 18 , 1989 ) , better known as Buster or Bus Clarkson , was a baseball player who played briefly in the major leagues and had a long career in the Negro leagues , the minor leagues , and the Puerto Rican Professional Baseball League .
 Buster Clarkson, Buster, Clarkson, baseball, major leagues, Negro leagues, minor leagues, Puerto Rican Professional Baseball League
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Buster Clarkson, Buster, Clarkson, baseball, major leagues, Negro leagues, minor leagues, Puerto Rican Professional Baseball League