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He often took photographs in his own time , and on an ad hoc basis alongside his full-time clerical position , continuing in this role until 1935 , when complaints concerning his monopolisation of departmental photography resulted in an inquiry that forced the arrangement to be discontinued .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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