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Rivalling at the time the collection of George Holford , it still , despite the ravages of time , contains more than 300 specimens including unusual and rare species , and many fine specimen trees .
 George Holford
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 George Holford