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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 .
 Arkady Dvorkovich
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Arkady Dvorkovich