15391
For the first time , we show the reduced density of reelin - and somatostatin - positive cells in the cortex and hippocampus of animals perinatally treated with PCP .
 Chemical: PCP
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: PCP 
Answer:
 Chemical: PCP