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In 1927 , Nikolai Koltsov proposed that inherited traits would be inherited via a " giant hereditary molecule " made up of " two mirror strands that would replicate in a semi-conservative fashion using each strand as a template " .
 person: Nikolai Koltsov
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: Nikolai Koltsov 
Answer:
 person: Nikolai Koltsov