10800
The present study employs an in vivo MMR assay developed in our laboratory to assess how prevalent environmental carcinogens such as polycyclic aromatic hydrocarbons ( PAHs ) affect MMR activity in human breast carcinoma 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