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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 .
 person: Darton; organization: Royal Navy
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Darton, Royal Navy 
Answer:
 person: Darton; organization: Royal Navy