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The Living Cosmos : Our Search for Life in the Universe is a non-fiction book by astronomer Chris Impey that discusses the subject of astrobiology and efforts to discover life beyond Earth .
 person: Chris Impey
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: Chris Impey 
Answer:
 person: Chris Impey