8915
Moreover , a net neurodegenerative process of the different brain areas was reported after Pb exposure as displayed by their marked amino cupric silver stained cells while these cells were devoid of any staining reaction after treatment with MUS only .
 Chemical: Pb; Chemical: amino cupric silver; Chemical: MUS
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: Pb, amino cupric silver, MUS 
Answer:
 Chemical: Pb; Chemical: amino cupric silver; Chemical: MUS