16339
Co - exposure to the prototypical PAH benzanthracene ( BZA ) and TNF - alpha was found to markedly induce mRNA expression and secretion of IL - 6 in human breast cancer cells MCF - 7 , whereas exposure to either BZA or TNF - alpha alone was without significant effect .
 Chemical: PAH; Chemical: benzanthracene; Chemical: BZA; Chemical: BZA
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: PAH; Chemical: benzanthracene; Chemical: BZA; Chemical: BZA