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Fact Avalanche is a terrific Twitter tool to fight back against climate change deniers # FactBack {{URL}} via {{USERNAME}} {{URL}}
 Fact Avalanche, Twitter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: group, creative work, person, event, product, location, corporation 
Text: {0} 
Answer:
 Fact Avalanche, Twitter