1514
Human dietary exposure to benzo ( a ) pyrene ( BaP ) has generated interest with regard to the association of BaP with gastrointestinal carcinogenesis .
 benzo ( a ) pyrene, BaP, BaP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 benzo ( a ) pyrene, BaP, BaP