5571
The evidence that antipsychotics improve brain function and reduce symptoms in schizophrenia is unmistakable , but how antipsychotics change brain function is poorly understood , especially within neuronal systems .
 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