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Four polls of AI researchers , conducted in 2012 and 2013 by Nick Bostrom and Vincent C. Müller , suggested a median probability estimate of 50 % that artificial general intelligence ( AGI ) would be developed by 2040 – 2050 .
 person: Nick Bostrom; person: Vincent C. Müller
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: Nick Bostrom, Vincent C. Müller 
Answer:
 person: Nick Bostrom; person: Vincent C. Müller