5032
p , p ' - DDE was negatively associated with length of gestation , controlling for p , p ' - DDT and o , p ' - DDT .
 Chemical: p , p ' - DDE; Chemical: p , p ' - DDT; Chemical: o , p ' - DDT
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: p , p ' - DDE, p , p ' - DDT, o , p ' - DDT 
Answer:
 Chemical: p , p ' - DDE; Chemical: p , p ' - DDT; Chemical: o , p ' - DDT