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Speeches by then-Premier Hua Guofeng and Vice Premier Fang Yi , the top government figure involved in science and technology , urged that scientists be given free rein in carrying out research as long as the work was in line with broad national priorities .
 person: Hua Guofeng; person: Fang Yi
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: Hua Guofeng, Fang Yi 
Answer:
 person: Hua Guofeng; person: Fang Yi