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Aldenham School is a co-educational independent school for pupils aged thirteen to eighteen , located between Elstree and the village of Aldenham in Hertfordshire , England .
 Aldenham, Elstree, Aldenham, Hertfordshire, England
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Aldenham, Elstree, Aldenham, Hertfordshire, England