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Butterflies Go Free ( French : Papillons en liberté ) is an annual exhibit at the Jardin Botanique de Montreal , featuring thousands of live tropical butterflies and moth s released in the Grande Serre of the exhibition greenhouses .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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