5074
Hierarchical cluster analysis created three groups and clustered : ( 1 ) PCB126 - exposed samples , ( 2 ) PCB153 and BDE47 , ( 3 ) PFOA and BPA .
 Chemical: PCB126; Chemical: PCB153; Chemical: BDE47; Chemical: PFOA; Chemical: BPA
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: PCB126; Chemical: PCB153; Chemical: BDE47; Chemical: PFOA; Chemical: BPA