23078
Exposure of pregnant women to polybrominated diphenyl ethers ( PBDEs ) may mean serious health risks .
 Chemical: polybrominated diphenyl ethers; Chemical: PBDEs
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: polybrominated diphenyl ethers; Chemical: PBDEs