22186
Films with 10 % , 15 % , and 20 % cocoa extract produced bactericidal effect against Staphylococcus aureus , Listeria monocytogenes , Escherichia coli and Salmonella enterica .
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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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