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Janet Murray , a prominent researcher in the discipline , describes this intersection as " a single new medium of representation , the digital medium , formed by the braided interplay of technical invention and cultural expression at the end of the 20th century " .
 person: Janet Murray
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: Janet Murray 
Answer:
 person: Janet Murray