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INTRODUCTION : Bioterrorism is a terrorist action involving the intentional release or dissemination of a biological warfare agent ( BWA ) , which includes some bacteria , viruses , rickettsiae , fungi or biological toxins .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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