30633
Resonance attachment of low - energy electrons to xenobiotic molecules , 2 , 4 - dichlorophenoxyacetic acid ( ) , dichlorodiphenyltrichloroethane ( ) and dichlorodiphenyldichloroethylene ( ) , was investigated under gas - phase conditions by means of complementary experimental techniques .
 Chemical: 2 , 4 - dichlorophenoxyacetic acid; Chemical: dichlorodiphenyltrichloroethane; Chemical: dichlorodiphenyldichloroethylene
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: 2 , 4 - dichlorophenoxyacetic acid; Chemical: dichlorodiphenyltrichloroethane; Chemical: dichlorodiphenyldichloroethylene