9669
We found increased alpha - syn - positive cells in the gray matter of Mn - exposed animals , typically observed in pyramidal and medium - sized neurons in deep cortical layers .
 Chemical: Mn
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: Mn 
Answer:
 Chemical: Mn