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Neo-Platonic philosophers such as Al-Farabi and Avicenna argued the world has always existed .
 person: Al-Farabi; person: Avicenna
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: Al-Farabi, Avicenna 
Answer:
 person: Al-Farabi; person: Avicenna