15670
Concentrations of PCDD / Fs , dioxin - like PCBs , PBDEs , and hexachlorobenzene in fat samples from cattle of different ages and gender in Korea .
 Chemical: PCDD / Fs; Chemical: dioxin - like PCBs; Chemical: PBDEs; Chemical: hexachlorobenzene
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: PCDD / Fs; Chemical: dioxin - like PCBs; Chemical: PBDEs; Chemical: hexachlorobenzene