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Therefore , we evaluated important markers of apoptosis and oxidative and nitrosative stress in oral mucosa cells by incubating the cells with Pb and BaP for 5 - 360 min .
 Chemical: Pb; Chemical: BaP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Pb; Chemical: BaP