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As Arkady Dvorkovich , Assistant to the Head of State , stated at a special press conference on the day of signing the document , " according to the opinion of our scientists , which is reflected in the climate doctrine , the share of human influence on climate change remains difficult to calculate .
 person: Arkady Dvorkovich
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: Arkady Dvorkovich 
Answer:
 person: Arkady Dvorkovich