80125
In spring 1998 , Boris Yeltsin dismissed his long-time head of government , Viktor Chernomyrdin , replacing him with Sergey Kirienko .
 person: Boris Yeltsin; person: Viktor Chernomyrdin; person: Sergey Kirienko
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: Boris Yeltsin, Viktor Chernomyrdin, Sergey Kirienko 
Answer:
 person: Boris Yeltsin; person: Viktor Chernomyrdin; person: Sergey Kirienko