16337
Co - exposure to environmental polycyclic aromatic hydrocarbons ( PAHs ) and interleukin ( IL ) - 1 beta induces expression of the tumor - promoting cytokine IL - 6 in cancer cells .
 Chemical: polycyclic aromatic hydrocarbons; Chemical: PAHs
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: polycyclic aromatic hydrocarbons; Chemical: PAHs