14860
The recognition of mRNA by the innate immune system was also associated with cell death , which proceeded in human respiratory cells via pyroptosis , a form of programmed cell death mediated by substantial overexpression of caspase - 1 .
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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:
 None