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The theory of neocortex was primarily motivated by the discoveries of David Hubel and Torsten Wiesel , who found several types of " feature detectors " in the primary visual area of the cortex .
 person: David Hubel; person: Torsten Wiesel
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: David Hubel, Torsten Wiesel 
Answer:
 person: David Hubel; person: Torsten Wiesel