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He mused about what is now referred to as the " Fermi paradox " : the contradiction between the presumed probability of the existence of extraterrestrial life and the fact that contact has not been made .
 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: Fermi 
Answer:
 person: Fermi