6597
Ngb can be regarded as a key mediator of the different protective effects of E ( 2 ) in the brain , including protection against oxidative stress and the control of inflammation , both of which are at the root of several neurodegenerative diseases .
 None
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:  
Answer:
 None