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Field was born at Chesham , Buckinghamshire and joined the Royal Navy , becoming a lieutenant on 20 December 1851 .
 Field, Chesham, Buckinghamshire
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Field, Chesham, Buckinghamshire