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After his marriage to Marjorie Fielding Duncan , he assumed this post which he held from 1925-1951 , interrupted only by three years ( 1931-1933 ) spent in Northern Rhodesia as Acting Game Warden and undertaking a faunal survey , and by five years ( 1941-1946 ) during which he was Director , Security Intelligence ( Uganda ) .
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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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