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The Giardino Botanico Alpinia ( 4 hectares ) is a botanical garden specializing in alpine plant s , located at 800 m altitude above Stresa on Lake Maggiore , Province of Verbano-Cusio-Ossola , Piedmont , Italy .
 Stresa, Province of Verbano-Cusio-Ossola, Piedmont, Italy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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Answer:
 Stresa, Province of Verbano-Cusio-Ossola, Piedmont, Italy