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Christopher Alexander describes common design problems as arising from " conflicting forces " - such as the conflict between wanting a room to be sunny and wanting it not to overheat on summer afternoons .
 person: Christopher Alexander
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: Christopher Alexander 
Answer:
 person: Christopher Alexander