3232
Menthol ' s characteristic cooling sensation is due , in part , to the activation of sensory neurons generally termed transient receptor potential ( TRP ) channels , in particular transient receptor potential melastatin family member 8 ( TRPM8 ) and transient receptor potential subfamily A , member 1 ( TRPA1 ) .
 Chemical: Menthol
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: Menthol 
Answer:
 Chemical: Menthol