16067
The effects of an environmentally relevant 58 - congener polychlorinated biphenyl ( PCB ) mixture on cardiac development in the chick embryo .
 Chemical: polychlorinated biphenyl; Chemical: PCB
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: polychlorinated biphenyl; Chemical: PCB