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The results suggested the possibility of building nuclear reactors ( first called " neutronic reactors " by Szilard and Fermi ) and even nuclear bombs .
 person: Szilard; person: Fermi
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Szilard, Fermi 
Answer:
 person: Szilard; person: Fermi