3148
It is concluded that PB , which promotes carcinogenesis when administered after the DEN treatment , reduces the carcinogen effect when given simultaneously with DEN .
 Chemical: PB; Disease: carcinogenesis; Chemical: DEN; Chemical: DEN
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: PB; Disease: carcinogenesis; Chemical: DEN; Chemical: DEN