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He could also use the ball well , but after 18 appearances , generally at left-back ( where he competed with Arthur Hartshorne ) , the directors released him , under the mistaken impression that one of his knees was unsound .
 person: Arthur Hartshorne
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: Arthur Hartshorne 
Answer:
 person: Arthur Hartshorne