1589
OCPs ( hexachlorocyclohexane ( HCH ) , aldrin , dieldrin , endosulfan , pp ' - dichlorodiphenyldichloroethylene ( pp ' - DDE ) , op ' - DDE , pp ' - dichlorodiphenyltrichloroethane ( pp ' - DDT ) , op ' - DDT , pp ' - dichlorodiphenyldichloroethane ( pp ' - DDD ) and op ' - DDD ) were extracted from blood and quantitatively estimated using gas chromatography .
 Chemical: hexachlorocyclohexane; Chemical: HCH; Chemical: aldrin; Chemical: dieldrin; Chemical: endosulfan; Chemical: pp ' - dichlorodiphenyldichloroethylene; Chemical: pp ' - DDE; Chemical: op ' - DDE; Chemical: pp ' - dichlorodiphenyltrichloroethane; Chemical: pp ' - DDT; Chemical: op ' - DDT; Chemical: pp ' - dichlorodiphenyldichloroethane; Chemical: pp ' - DDD; Chemical: op ' - DDD
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: hexachlorocyclohexane; Chemical: HCH; Chemical: aldrin; Chemical: dieldrin; Chemical: endosulfan; Chemical: pp ' - dichlorodiphenyldichloroethylene; Chemical: pp ' - DDE; Chemical: op ' - DDE; Chemical: pp ' - dichlorodiphenyltrichloroethane; Chemical: pp ' - DDT; Chemical: op ' - DDT; Chemical: pp ' - dichlorodiphenyldichloroethane; Chemical: pp ' - DDD; Chemical: op ' - DDD