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Hadyn Keeton ( 1847 – 1921 ) was an cathedral organist , who served at Peterborough Cathedral .
 person: Keeton
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: Keeton 
Answer:
 person: Keeton