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Admiral Richard Darton Thomas ( 3 June 1777 – 21 August 1857 ) was a Royal Navy officer who went on to be Commander-in-Chief , Pacific Station .
 Darton, Royal Navy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Darton, Royal Navy