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Percy Clinton Sydney Smythe , 6th Viscount Strangford , GCB , GCH ( 31 Aug 1780 – 29 May 1855 ) was an Anglo-Irish diplomat .
 Percy, Smythe, 6th Viscount Strangford
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Percy, Smythe, 6th Viscount Strangford