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Witmer is considered to be one of the world 's foremost expert in soft anatomy of dinosaur heads , because he is famous for combining dissection of living reptiles with CT-scans of dinosaur skulls .
 person: Witmer
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: Witmer 
Answer:
 person: Witmer