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Knighted in 1907 , on the retirement of Sir Arthur Godley in 1910 Ritchie became the Permanent Under-Secretary of State , a position he continued to hold until his death .
 Arthur Godley, Ritchie
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Arthur Godley, Ritchie