29944
In the majority of neurons tested , TRH induced reversible TTX - resistant membrane depolarization .
 Chemical: TRH; Chemical: TTX
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: TRH, TTX 
Answer:
 Chemical: TRH; Chemical: TTX