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Marvin Kratter ( born on November 9 , 1915 in Brooklyn , died October 24 , 1999 in Encinitas , California ) was a New York-based real estate investor who was the head of the Kratter Corporation , National Equities , Countrywide Realty , Knickerbocker Brewery , Rom-American Pharmaceuticals , and the Boston Celtics .
 Marvin Kratter, Brooklyn, Encinitas , California, Kratter, Boston Celtics
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marvin Kratter, Brooklyn, Encinitas , California, Kratter, Boston Celtics