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The garden was established circa 1901 by Arturo Hruska , an Austria n dentist , who from 1910-1971 collected many species on the grounds of his villa , organized as a dense forest of bamboo , Japanese ponds , streams , and waterfalls , as well as alpine plant s in ravines .
 Austria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Austria