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An ethnic analysis was made of 8947 cases of primary central nervous system ( CNS ) tumors seen at the Armed Forces Institute of Pathology ( AFIP ) , Washington , DC , from 1971 to 1985 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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