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“ Uncertainty , Evolution , and Economic Theory ” is an article written in 1950 by economist Armen Alchian ( 1914-2013 ) .
 person: Armen Alchian
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Armen Alchian 
Answer:
 person: Armen Alchian