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The data indicates that fetal exposure to dioxins and furans ( PCDD / Fs ) , polychlorinated biphenyls ( PCBs ) , p , p ' - DDE , and methylmercury depends on the mother ' s parity , and age .
 Chemical: dioxins; Chemical: furans; Chemical: PCDD; Chemical: polychlorinated biphenyls; Chemical: PCBs; Chemical: p , p ' - DDE; Chemical: methylmercury
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: dioxins; Chemical: furans; Chemical: PCDD; Chemical: polychlorinated biphenyls; Chemical: PCBs; Chemical: p , p ' - DDE; Chemical: methylmercury