1867
To examine the effects of standardized ( reference ) tobacco preparations on human oral cavity cells , two oral squamous cell carcinoma cell lines ( 101A , 101B ) and normal human gingival epithelial cells ( HGEC ) were treated with cigarette smoke total particulate matter ( TPM ) , smokeless tobacco extracted with complete artificial saliva ( ST / CAS ) , or whole - smoke conditioned media ( WS - CM ) .
 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