2281
Alpha - lipoic acid protects sensory neurons through its anti - oxidant and mitochondrial regulatory functions , possibly inducing the expression of frataxin .
 Chemical: Alpha - lipoic acid
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: Alpha - lipoic acid 
Answer:
 Chemical: Alpha - lipoic acid