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According to Heinsohn , who proposed youth bulge theory in its most generalized form , a youth bulge occurs when 30 to 40 percent of the males of a nation belong to the " fighting age " cohorts from 15 to 29 years of age .
 person: Heinsohn
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: Heinsohn 
Answer:
 person: Heinsohn