19422
Strongest effects in thyroid follicles were elicited by PCB - 153 , in thymus and liver by BDE - 47 .
 Chemical: PCB - 153; Chemical: BDE - 47
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: PCB - 153; Chemical: BDE - 47