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This theory originates with the developmental psychologist Lev Vygotsky , who observed that children will often narrate their actions out loud before eventually replacing the habit with the adult equivalent : sub-vocal articulation .
 person: Lev Vygotsky
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: Lev Vygotsky 
Answer:
 person: Lev Vygotsky