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History Following the opening of the prison in 1848 , which held adult convicts until 1921 , after which is was converted to a Borstal and then a YOI in 1988 , the gardens were laid out in 1851 , in the style of a French Palace Garden .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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