15713
Introduction : Sigma receptors are involved in several central nervous system ( CNS ) disorders , including mood disorders ( depression and anxiety ) , psychosis , schizophrenia , movement disorders ( i . e . , Parkinson ' s disease ) and memory deficits ( i . e . , Alzheimer ' s disease ) .
 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