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We found that ethanol extract of M . officinalis prevented LPS - induced memory deficiency as well as inhibited the LPS - induced elevation of inflammatory proteins , such as inducible nitric oxide synthase and cyclooxygenase 2 , and activation of astrocytes and microglia .
 Chemical: ethanol; Chemical: nitric oxide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: ethanol, nitric oxide 
Answer:
 Chemical: ethanol; Chemical: nitric oxide