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On 12 August 1822 , his half-brother committed suicide He succeeded his half-brother as " 3rd Marquess of Londonderry " in 1822 .
 location: Londonderry
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Londonderry