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In 1989 the Garden was purchased by the Piedmont Region to become part of the Museo Regionale di Scienze Naturali di Torino , and in 1992 it opened to the public .
 Piedmont
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Piedmont