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Corydon and the Island of Monsters is the first instalment of the Corydon Trilogy , penned by Tobias Druitt ; a pseudonym for a mother-son writing combination .
 person: Tobias Druitt
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: Tobias Druitt 
Answer:
 person: Tobias Druitt