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He has also published two books of his work : 2000 's Voices of Light , and 2007 's In Search of Peace , recipient of the 2007 IP Outstanding Book of the Year Award .
 None
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:  
Answer:
 None