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As a result this article reviews the possible role of ethanol as a neuroprotective agent in stroke and traumatic brain injury ( TBI ) .
 Chemical: ethanol
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 
Answer:
 Chemical: ethanol