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In 1959 , Freeman Dyson observed that every developing human civilization constantly increases its energy consumption , and , he conjectured , a civilization might try to harness a large part of the energy produced by a star .
 person: Freeman Dyson
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Freeman Dyson 
Answer:
 person: Freeman Dyson