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Early life , education and career Frank Kratovil was born in Lanham , Maryland , spent his childhood in Prince George 's County , Maryland .
 Frank Kratovil, Lanham , Maryland, Prince George 's County , Maryland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Frank Kratovil, Lanham , Maryland, Prince George 's County , Maryland