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Though the exact dates of his birth and death are unknown , he is said by Gallus Anonymus to have lived in the second half of the 11th century .
 person: Gallus Anonymus
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: Gallus Anonymus 
Answer:
 person: Gallus Anonymus