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Recently it has become clear that exposure to xenobiotics may result in various forms of cell death ; not only passive cell deaths like necrosis , or programmed cell deaths such as apoptosis , but also regulated necrosis , autophagy , senescence , or mitotic catastrophe .
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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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